| MILNER (Roy M) | Postal history of the Australian Antarctic 1911-1965 [1980] | N/A |
| MIRABAUD (Paul) | The postage stamps of Switzerland 1843-1862 [1975] | N/A |
| MISRA (B B) | Postal communications in India 1773-1834 [1959] | N/A |
| MITCHELL (D A) | The postmarks, postal routes & principal postage rates of Southern Rhodesia to 1984 | N/A |
| MOELLER (Peter) | Die flugpost der Volksrepublik China 1949-1981 [1982] | N/A |
| MOFFATT (W G) | The squared circle postmarks of Canada, 4th ed | N/A |
| MOLDENHAUER (F C ) | The maritime postal history of Norwegian steamships [1971] | Maritime |
| MOLL (Herbert H) | Historia postal y filatelica del Peru [1983] | N/A |
| MOLL (Herbert H) | Peruvian civil aviation [2000] | Aviation |
| MOLNAR (G P) | Ship letters of Australia 1788 – 1901 Vol. 1 – The European & Australian Royal Mail Company 1857-8; Vol. 2 – The Orient Line 1879-1900 [1990-92] | Maritime |
| MONTGOMERY (M. B.) | The Post in Portsmouth 2nd Edition [2011] | N/A |
| MONTGOMERY (Malcolm B) | The post in Southampton | N/A |
| MONTGOMERY (Malcolm B) | The postage rates of North Atlantic mails (1635-1950). The inland and postage rates applied to letters between the United Kingdom & North America [1991] | Maritime |
| MOON (W J) | Seychelles: a catalogue of cancellations. [1960] | N/A |
| MOORE (AW) | The Isle of Man Steam Packet Co Ltd 1830 – 1904 [1904] | Maritime |
| MOORHOUSE (Brian) | The postal history of the Chaco War (Bolivia and Paraguay) 1932-1935 [2007] | Military |
| MORENWEISER (K) | British empire civil censorship devices, World War II: section 2 United Kingdom | Censorship, WW2 |
| MORENWEISER (Konrad) | Zivilzensur in Britisch Indien 1939-1945, handbuch und katalog [1985] | N/A |
| MORETON (C) | Post Offices notices extracted from The London Gazette 1666-1800 | N/A |
| MORETON (Rod) | The development of the Marseilles and Brindisi routes for homeward bound UK mail from Victoria, to 1880 [1985] | Maritime |
| MORETON (Rod) | The goldfields of Victoria: mail from the first fifty years of this Australian gold rush era [2001] | N/A |
| MORGAN (Glenn H) | Royal household mail: from the royal residences, households and offices of Great Britain past, present and temporary [1992] | Official |
| MORRIN (N P J) | Keeping in Touch, Communication through County Kildare before 1860 [1998] | N/A |
| MORRIS (K) | Paquebot Cancellations of the World and more, 2010 | N/A |
| MORRIS (K) & DOVEY (M) | The Travelling Post Office Cancellations of Great Britian & Ireland [2016] | Railways |
| MORTON (C S) | Treaty Post postmarks on Hong Kong stamps [1927] | N/A |
| MORTON (C S) | Hong Kong & the Treaty Ports: postal history & postal markings…revised by H E Lobdell & Adrian Hopkins (1949) | N/A |
| MORTON (D G) | Southern African Air Mails, extracts from the South African Philatelist 1931-1973 [2005] | Aviation |
| MOSHER (Ernest A) | Mourning covers: The Cultural & Postal History of Letters edged in Black [2003] | N/A |
| MOSS (Graham) | A collectors guide to the care & repair of books & documents [1991] | N/A |
| MOSS (Graham) | The Middlewich letters: carriers mail on the Trent & Mersey Canal in 1846 [1989] | Canals |
| MOSS (Graham) | The Post Office & the Empire Exhibition [Glasgow] 1938 [1988] | Exhibitions |
| MOSTER (Koos) | KPHTH = Kreta = Crete: postgeschiedenis – postzegels – postal history – stamps… | N/A |
| MOUBRAY (Jane) | British letter mail to overseas destinations 1840-1880 [1998] | N/A |
| MOUBRAY (Jane) | British letter mail to overseas destinations 1840-1875 [1992] | N/A |
| MOUBRAY (Michael) | British letter mail to overseas destinations 1840-1875 | N/A |
| MOXTER (Hans G) | Censorship of mail in Ireland [2003] | Censorship, Military |
| MOXTER (Hans G) | The Mileage Marks of Ireland 1808-1839 [1994] | N/A |
| MOY (John A E) | The use of the 1894 coded time system in English provincial offices [1991] | N/A |
| MOYLES (A) | Parcel Post Malta [2002] | Parcels |
| MUDD (David) | The Falmouth packets [1978] | Maritime |
| MUELLER (Edwin) | Handbook of the pre-stamp postmarks of Austria [1960] | N/A |
| MUELLER (Edwin) | Handbuch der entwertungen von Osterreich und Lombardei-Venetien auf den friemarken-ausgaben 1850, 1858-9, 1860-1, 1863 und 1863-4 [1961] | N/A |
| MUELLER (Edwin) | Die poststempel auf der freimarken-ausgabe 1867 von Osterreich und Ungarn Vol. 1 -Hungary [1930] | N/A |
| MUENTZ (George H) | A valuation guide to The Ottoman post & telegraph offices in Palestine & Sinai, 2000 by Norman Collins | N/A |
| MUGGERIDGE (Sidney J) | The postal history of Maidstone & the surrounding villages; with notes on their postal markings [1972, 1974] | N/A |
| MUGGLETON (D J) | A postal history of Cambridge [1970] | N/A |
| MUNZBERG (Werner) | Deutsche vorphilatelie: stationskatalog, katalog der aufgabestempel | N/A |
| MUNZBERG (Werner) | Preussen: Kurbrandenburgische post; Preussische post; Norddeutsche bundespost; Deutsche reichpost, Postgeschichte und postanstalten 1649-1923 [1991-2] | N/A |
| MUNZBERG (Werner) | Thurn und Taxis ortsaufgabestempel A-Z, 2 vol [1976] | N/A |
