na INLIS000000000003964 Inggris 0010-0721000024 Proceedings of the regional symposium on insect resistance to insecticides, 11-13 May 1959 Cairo, UAR Regional Symposium on Insect Resistance to Insectides Regional Symposium on Insect Resistance to Insectides Cairo Unesco 1959 xxii, 223 p.: ill.; Index 20 cm. 632.951 REG p 632951 INSECTICIDES PEST RESIATANCE 250/KA/2021