Biological control of insects, and facilities for inter-American cooperation in the exchange of beneficial insects
By: by C.P. Clausen ...
Series: Publicaciones del Comité permanente de la segunda Conferencia internacional de agricultura, sección -- 3 A
Published: 1944
Place of publication: Mexico, D.F
Language: eng
Number of pages: 19
Subjects: Insect pests; Biological control