TY  - BOOK
AU  - Harvey  L. Sweetman
TI  - Principles of biological control : Interrelation of hosts and pests and utilization in regulation of animal and plant population
U1  - 632.96 
PY  - 1958///
CY  - Iowa
PB  - WM. C.Brown Company
N1  - Harvey  L. Sweetman: Principles of biological control : Interrelation of hosts and pests and utilization in regulation of animal and plant populations.  (2nd Printing)  Iowa.  WM. C.Brown Company, 1958.--(632.96SWE)
ER  -