The world food problem : a guardedly optimistic view / [by] Willard W. Cochrane. Cochrane, Willard Wesley, 1914- Food supply. Population. HD9000.5 .C59 338.19 COW New York : Crowell, 1969. 1969. 1969 Text xv, 331 p. : eng The Crowell economics series Crowell/Challenge series.