Recognition of diseases and pests of farm crops
[by] Ernst Gram, Prosper Bovien [and] Chr. Stape.

APA Citation

Gram, E., Gram, E., Stapel, C., Bovien, P. (1958). Recognition of diseases and pests of farm crops. [Copenhagen]: Published by The Danish Agricultural Information and Advisory Aids Service.

MLA Citation

Gram, Ernst, 1891-, Ernst Gram, Chr Stapel, and Prosper Bovien. Recognition of Diseases And Pests of Farm Crops. [Copenhagen]: Published by The Danish Agricultural Information and Advisory Aids Service, 1958.