TY  - BOOK
AU  - Johansen, Carl A.
TI  - Honeybee poisoning by chemicals; signs, contribution factors, current problems and prevention
KW  - Abejas
KW  - Pesticidas
KW  - Efecto en insectos
N1  - Sobretiro de : Bee word 60(3):109-127, 1979
ER  -