Tiwari, R.K. Ecosystems and human health / R.K Tiwari. - India : Oxford Book Company, 2007 - iv, 269 pg. 24 cm. Includes index. ISBN: 9.78819E+12 Subjects--Topical Terms: Environmental HealthEnvironmental PollutionHazardous Substances National Library of Medicine Call No.: WA 670 / .T59 2007