Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
632.95 W927 74421 88123 C16641 C20745 C2525
World Health Organization Specifications for pesticides 2nd. - Geneva WHO 1961 523p. 3rd ed.: used in public health. 5th ed : insecticides, molluscicides, repellents methods * Pesticides