Zeylstra, Willem Gustaaf. Aid or development : the relevance of development aid to problems of developing countries / by Willem Gustaaf Zeylstra. - Leyden : A. W. Sijthoff, 1977. - xviii, 268 p. ; 24 cm. Bibliography: 259-268. pp. ISBN: 9028601155 LCCN: 75309202 Nat. Bib. No.: Ne*** Subjects--Topical Terms: Economic development. LC Class. No.: HD82 / .Z48 Dewey Class. No.: 338.91 / ZEY 1977