68. HEALTH AND SAFETY GUIDE / WHO 552,172 POLYCHLORINATED Polychlorinated biphenyls (PCBs) and polychlorinated terphenyls (PCTs) : health and safety guide / IPCS [International Programme on Chemical Safety]. - Geneva: Publ. by the World Health Organization for the IPCS (a collaborative programme of the United Nations Environment Programme, the International Labour Organisation, and the WHO), 1992. - 52 s. ; 21 cm s. ; 21 cm (Health and Safety Guide / WHO, ISSN 0259-7268 ; nr 68) ISBN 92-4-151068-4