World Health Organization Heptachlor - - Geneva W H O 2006 - 74 p. 29 cm. - I P C S :ICAD 70 . Heptachlor -Toxicity, Environmental Exposure ISBN: 92 4 153070 7 Subjects--Topical Terms: Environmental ExposureHeptachlor -Toxicity Dewey Class. No.: SERIALS / WHO