TY  - GEN
TI  - Biological control in crop production
SN  - 0246115122
PY  - 1981///
CY  - Totowa, N.J. : 
PB  - Allanheld, Osmun, 
KW  - Pests --Biological control --Congresses
KW  - Plants, Protection of --Congresses
ER  -