Winston, Gordon C. On the inevitability of factor substitution / Gordon C. Winston - Williamstown : Williams College, 1972 - 23p. : 30 cm. - Photocopy of USAID mf. no.:PB-223 886 Center for Development Economics, research memorandum . Includes index. Subjects--Topical Terms: Resource allocation Dewey Class. No.: 338.97 / WIN