Planning and plan implementation / papers submitted to the Planning Committee for Development Planning at its second session, held at Santiago, Chile, from 10 to 20 April 1967. United Nations. Economic and Social Council. Committee for Development Planning. United Nations. Department of Economic and Social Affairs. Economic policy. Social policy. JX1977 .A2 ST/ECA/102 338.9 UNP At head of title: Dept. of Economic and Social Affairs. "United Nations publication. Sales no.: 67.II.B14." New York : United Nations, 1967. 1967. 1967 Text vi, 245 p. : eng