its theory and practice Sengupta, Benoyendra creator text Calcutta World Press 1974 3rd rev. ed monographic xviii,471p. 21cm(Hb) by Benoyendra Sengupta Includes bibliographical references and index Cataloging Library catalogs 025.3 SEN A-226934 Cen Lib/Ret DPL 20170124110222.0 EN