Ray, S. K. creator text New Delhi Prentice-Hall of India 1991 monographic xvi,232p. : 21cm(Hb) ill by S. K. Ray Includes bibliographic references and index Informal sector (Economics) Cooperative societies 330 RAY 08769269110 A-472949 Cen Lib/Ret DPL 20170124110008.0 EN