World resources 1990-91 : a report by the World Resources Institute in collaboration with the United Nations Environment Programme and the United Nations Development Programme. - New York Oxford Univ. Press 1990. - xiv, 383 p. maps 28 cm. Includes bibliographical references and index. ISBN: 0195062280 0195062299 (pbk.) 9780195062281 9780195062298 (pbk.) Subjects--Topical Terms: Economic policy--Environmental aspects.Environmental policy.Natural resources.âEcologie urbaine.Dâeveloppement âeconomique--Aspect de l'environnement.Dâeveloppement durable.Environnement--Protection.Histoire âeconomique--1990-Ressources naturelles.Natuurlijke hulpbronnen. LC Class. No.: HC59 / .W6675 1990