Porwal, M.C. . Remote sensing analysis of environmental resources for planning and development / by M.C. Porwal. - New Delhi : APH Pub. Corp., 1997. - xxi, 302 p. : ill. ; 22 cm. Includes bibliographies. ISBN: 8170248086 Subjects--Topical Terms: Environnement --Surveillance --Uttar Pradesh. Dewey Class. No.: 333.71554 / POR 1997