BIOLOGICAL INVESTIGATIONS ON HYMENOPTEROUS EGG-PARASITES OF THE PINE CATERPILLAR AND THEIR UTILIZATION IN BIOLOGICAL CONTROL
BIOLOGICAL INVESTIGATIONS ON HYMENOPTEROUS EGG-PARASITES OF THE PINE CATERPILLAR AND THEIR UTILIZATION IN BIOLOGICAL CONTROL
松毛虫卵寄生蜂的生物学考查及其利用