TY - BOOK AU - Eckholm,Erik P. TI - Losing ground: environmental stress and world food prospects T2 - Pergamon Oxford geographies SN - 0080214967 : U1 - 338.19 PY - 1978///, c1976 CY - Oxford, New York PB - Pergamon Press KW - Agriculture KW - Environmental aspects KW - Nature KW - Effect of human beings on KW - Food supply KW - Soil erosion N1 - Includes index; Bibliography: [203]-219 ER -