The biological strains fo hessian fly - Painter, Reginald H (1930)
Sobretiro de: Journal of economic entomology 23 (2): 322-326, 1930. Encuadernado con: Key to gall midges (A resume of studies I-VII, itonididae) /by Ephraim Porter Felt 70-214
Keywords: Dipteros -- Colecciones de escritos Hessian flies