Tolba, Mostafa Kamal. Earth matters / Mostafa Kamal Tolba ; selected and edited by Robert Lamb and Patrick Allen. - Nairobi, Kenya : United Nations Environment Programme, 1983. - viii, 163 p. ; 25 cm. ISBN: 9280710745 (pbk.) LCCN: 85980587 Subjects--Topical Terms: Environmental protection. LC Class. No.: TD170.3 / .T652 1983 Dewey Class. No.: 333.72