Using pesticides safely /
Hock, W.K.
Using pesticides safely / by W.K. Hock - Pennsylvania : The Pennsylvania State University - 12 p. - Special circular; 296 .
205178
Pesticidas -- análisis
Pesticidas -- medidas de seguridad
Using pesticides safely / by W.K. Hock - Pennsylvania : The Pennsylvania State University - 12 p. - Special circular; 296 .
205178
Pesticidas -- análisis
Pesticidas -- medidas de seguridad
