TY  - BOOK
AU  - Ernst, Gram
TI  - Redognition and control of pests and diseases of farm crops
U1  - PA 632 R44 1980 
CY  - London
PB  -  Blandford Press
KW  - Control de plagas
KW  - Cultivos
KW  -  Enfermedades
KW  -  plagas
KW  - Fitopatología
ER  -