Isayev, V.V. 1975 Significance of quarantine measures for preventing spread of San Jose scale [Quadraspidiotus perniciosus (Comst.)] and its eradication in northern Caucasus.. VIII International Plant Protection Congress 3: 181-187.
Isayev, V.V. 1975 Significance of quarantine measures for preventing spread of San Jose scale [Quadraspidiotus perniciosus (Comst.)] and its eradication in northern Caucasus.. VIII International Plant Protection Congress 3: 181-187.