Principles of biological control : Interrelation of hosts and pests and utilization in regulation of animal and plant population - Harvey L. Sweetman (Iowa WM. C.Brown Company, 1958)
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)
ENGLISH