Geography and a crowding world : A Symposium on population pressures upon physical and social resources in the developing lands - Symposium on Population Pressures upon Physical and Social Resources in the Developing Lands, Pennsylvania State University, 1967; Kosinski, Leszek A; Prothero, R. Mansell; Zelinsky, Wilbur, 1921 (New York ; London : Oxford University Press, 1970)
Includes bibliographical references and index
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Keywords: Developing countries -- Population -- Congresses