Monografia delle cocciniglie italiane. Opera postuma - Leonardi, Gustavo, 1869 -1918 (Stab. tip. E. Della Torre, 1920)

A monograph of the British phytophagous Hymenoptera ... - Cameron, Peter, 1847 -1912 (Printed for the Ray Society, 1890)

Monograph of the Coccidæ of the British Isles - Newstead, Robert, 1859 -1947 (Printed for the Ray society, 1901)

Monographia uredinearum : seu specierum omnium ad hunc usque diem cognitarum descriptio et adumbratio systematica - Sydow, P. (Paul), 1851 -1925 (Fratres Borntraeger, 1904)

The Monthly bulletin of the State Commission of Horticulture - California. State Commission of Horticulture. (The Commission, 1911)

The Monthly bulletin of the State Commission of Horticulture - California. State Commission of Horticulture. (The Commission, 1914)

The Monthly bulletin of the State Commission of Horticulture - California. State Commission of Horticulture. (The Commission, 1916)

Monthly letter - United States. Bureau of Entomology. (1933)

Monthly microscopical journal: transactions of the Royal Microscopical Society, and record of histological research at home and abroad - Royal Microscopical Society (Great Britain) (R. Hardwicke, 1872)

Morphology and taxonomy of fungi - Bessey, Ernst Athearn, 1877 -1957 (Blakiston, 1950)

Moths - Bell, Thomas Reid Davys, 1863 -1948 (Taylor and Francis; [etc., etc.], 1892)

Museum bulletin - New York State Museum. (University of the State of New York, 1908)

Museum bulletin - New York State Museum. (University of the State of New York, 1909)

Museum bulletin - New York State Museum. (University of the State of New York, 1910)

Museum bulletin - New York State Museum. (University of the State of New York, 1911)

Museum bulletin - New York State Museum. (University of the State of New York, 1912)

Museum bulletin - New York State Museum. (University of the State of New York, 1913)

Museum bulletin - New York State Museum. (University of the State of New York, 1914)

Museum bulletin - New York State Museum. (University of the State of New York, 1915)