Mittheilungen der Naturforschenden Gesellschaft in Bern - Naturforschende Gesellschaft in Bern. (Naturforschenden Gesellschaft in Bern], 1908)

Mollusca ... - Gude, Gerard Kalshoven, 1858 - (Taylor and Francis; [etc., etc.], 1914)

Mollusca–II. (Trochomorphidae–Janellidae) - Gude, Gerard Kalshoven, 1858 - (Taylor and Francis, 1914)

I molluschi dei terreni terziarii del Piemonte e della Liguria - Bellardi, Luigi, 1818 -1889 (Stamperia Reale, 1897)

Die Mollusken-Fauna Mitteleuropa's - Clessin, Stephan, 1833 -1911 (Bauer & Raspe, 1884)

Molluskenfauna von Schlesien - Merkel, Eduard (J.U. Kern's Verlag, 1894)

Mollusques terrestres et fluviatiles de Syrie - Gadeau de Kerville, Henri, 1858 -1940 (J.-B. Baillière et fils, 1921)

Mollusques terrestres et fluviatiles de Syrie - Gadeau de Kerville, Henri, 1858 -1940 (J.-B. Baillière et fils, 1922)

Moluscos terrestres, fluviais e das águas salobras : 2. fasc - Nobre, Augusto, 1865 -1946 (Livraria Ferin, Baptista, Torres, 1913)

Monitore zoologico italiano - Unione zoologica italiana. (Instituto anatomico della R. Università di Siena, 1890)

A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum - British Museum (Natural History). Department of Botany. (Printed by Order of the Trustees, 1911)

A monograph of the British lichens; a descriptive catalogue of the species in the Department of Botany, British Museum - British Museum (Natural History). Department of Botany. (Trustees of the British Museum, 1918)

Monograph of the land & freshwater Mollusca of the British isles - Roebuck, William Denison, 1851 -1919 (Taylor brothers, 1916)

A monograph of the Mycetozoa; a descriptive catalogue of the species in the Herbarium of the British museum - British Museum (Natural History). Department of Botany. (Printed by order of the Trustees of the British museum, 1925)

A monograph of the Mycetozoa, being a descriptive catalogue of the species in the herbarium of the British Museum. Illustrated with seventy-eight plates and fifty-one woodcuts - British Museum (Natural History). Department of Botany. (Printed by Order of the Trustees, Sold by Longmans [etc.], 1894)

A monograph of the Mycetozoa : a descriptive catalogue of the species in the Herbarium of the British Museum - British Museum (Natural History). Department of Botany. (Printed by order of the Trustees of the British Museum, 1911)

Monograph of the Myxogastres - Brandsten, Gustav Fredrik. (Methuen, 1892)