TY  - BOOK
CN  - S21
CN  - S21
CY  - Washington,
DA  - [1952]
ID  - 108534
KW  - Insects
KW  - Beneficial insects
KW  - Insect pests
KW  - Insecticides.
N1  - Issued also as Home document no. 413, 82d Cong., 2d sess.
PB  - U.S. Govt. Print. Off.
PP  - Washington,
PY  - [1952]
T1  - Insects.
TI  - Insects.
VL  - 1952
ER  -