World Health Organization Patially halogenated chlorofluorocarbons (ethane derivates) - - Geneva W H O 1992 - 130 p. 24 cm. - IPCS:EHC139 . Freons -Toxicity ISBN: 92 4 157139 X Subjects--Topical Terms: Freons -Toxicity Dewey Class. No.: SERIALS / WHO