The United Nations system and its functions : selected readings / edited by Robert W. Gregg and Michael Barkun. - Princeton, N.J. : Van Nostrand, c1968 - iv, 460 p. : illus. ; 23 cm. - Van Nostrand political science series . Bibliographical footnotes. Subjects--Corporate Names: United Nations. Dewey Class. No.: 341.1308 / UNI 1968