TY  - BOOK
AU  - Swan,Lester
TI  - Beneficial insects: nature's alternatives to chemical insecticides : animal predation, parasitism, disease organisms 
U1  - 595.7 
PY  - 1964///
CY  - New York
PB  - Harper & Row
KW  - ENTOMOLOGIA
KW  - INSECTOS UTILES Y PERJUDICIALES
ER  -