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Folder, "NSAM # 349: Development of the Frontiers of South America, 5/31/1966 [3 of 3]," National Security Action Memorandums, NSF, Box 8 (Item)
  • ratio - Technology deficient; meager resources for human subsistence Sources: Philip M. Hauser and Otis 0. Duncan (Editors). THE STUDY OF POPULATION: AN INVENTORY AND APPRAISAL. Uni·versity of Chicago Press, 1959, and Or. Wilbur Zelinsky . A PROLOGUE