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

Monograph of the British aphides ... - Buckton, George Bowdler, 1817 -1905 (Printed for the Ray Society, 1876)

Monograph of the British aphides ... - Buckton, George Bowdler, 1817 -1905 (Printed for the Ray Society, 1879)

Monograph of the British Cicadae or Tettigidae - Buckton, George Bowdler, 1817 -1905 (Macmillan & Co, 1890)

A monograph of the British Desmidiaceæ - West, G. S. (George Stephen), 1876 -1919 (The Ray Society, 1905)

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

Monographie der Mistel - Neckel, Gustav, 1878 -1940 (Oldenbourg, 1923)

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

Monthly letter - United States. Bureau of Entomology. (1915)

Monthly letter - United States. Bureau of Entomology. (1916)

Monthly letter - United States. Bureau of Entomology. (1917)

Monthly letter - United States. Bureau of Entomology. (1918)

Monthly letter - United States. Bureau of Entomology. (1919)

Monthly letter - United States. Bureau of Entomology. (1921)

Monthly letter - United States. Bureau of Entomology. (1922)

Monthly letter - United States. Bureau of Entomology. (1923)

Monthly letter - United States. Bureau of Entomology. (1924)

Monthly letter - United States. Bureau of Entomology. (1925)

Monthly letter - United States. Bureau of Entomology. (1926)

Monthly letter - United States. Bureau of Entomology. (1927)

Monthly letter - United States. Bureau of Entomology. (1928)

Monthly letter - United States. Bureau of Entomology. (1929)

Monthly letter - United States. Bureau of Entomology. (1930)

Monthly letter - United States. Bureau of Entomology. (1931)

Monthly letter of the Bureau of Entomology - United States. Bureau of Entomology. (The Bureau, 1923)

Monthly letter of the Bureau of Entomology - United States. Bureau of Entomology. (The Bureau, 1924)