Metcalf, R. L

advance in best control research Metcalf, R L 1962 ADVANCE IN PEST CONTROL RESEARCH METCALF R.L 1962 ADVANCE IN PEST CONTROL RESEARCH METCALF R.L 1961 ADVANCE IN PEST CONTROL RESEARCH METCALF R.L 1960 ADVANCE IN PEST CONTROL RESEARCH METCALF R.L 1958 ADVANCE IN PEST CONTROL RESEARCH METCALF R.L 1957 Advances in pest control research Metcalf, R. L. 1962 ADVANCES IN PEST CONTROL RESEARCH METCALF R.L. 1958 Advances in pest control research Metcalf, R.L. 1957 ADVANCES IN PEST CONTROL RESEARCH METCALF R.L. 1957 Advances in pest control research Metcalf, R. L. 1957 Advances in pest control research Author not listed Year not listed Advances in pest control research Author not listed Year not listed Advances in pest control Research Author not listed Year not listed Advances in pest control research Author not listed Year not listed Advances in pest control research Author not listed Year not listed Advances in pest control research Author not listed Year not listed Advances in pest control research Author not listed Year not listed Advances in rest control research Metcalf, R. L. 1961 Destructive and Useful Insects Metcalf, R. L. 1962