632.95 Zwe A Zweig, Gunter ed. Analytical methods for pesticides, plant growth regulators, and food additives. New York, Academic Press, 1964 t. diagrs., tablas. 24 cm Bibliografía al final de los capítulos. Contiene: t. 1. Principles, methods, and general applications.-t. 2. Insecticides.-t. 3. Fungicides, nematocides and soil fumigants, rodenticides, and food and feed additives.- t.4. Herbicides.- La Biblioteca tiene t. 2 3