Fertilizers and high yielding varieties of rice wheat and maize in t he developing countries. - World Food Congress, 1970 : Hague); Centre D'etude de L'azote. (Zurich : Centre D'etude de L'azote, 1970)
Published on the occasion of the Second World Food Congress.
Includes bibliographical references.
Keywords: Grain -- Fertilizers; Grain -- Varieties