TURK, AMOS ECOLOGIA, CONTAMINACION, MEDIO AMBIENTE / AMOS TURK, JONATHAN TURK, JANET T. WITTES - MEXICO : INTERAMERICANA - 227 P. / 23 CM. ISBN: 968-25-0088-5 Subjects--Topical Terms: 1. CONTAMINACION 2. ECOLOGIA 3. POBLACION LC Class. No.: TD174 T87 1973