EXTREMELY /555,926 Extremely low frequency (ELF) fields ;. - Geneva : World Health Organization, 1984. - 131 s. t: il., wykr. ) 21 cm. - (Environmental Health Criteria ; 35) U dołu s. tyt.: Published under the joint sponsorship of the United Nations Environment Programme, the World Health Organization, and the International Radiation Protection Association. -Bibliogr. s. 103-128 ISBN 92-4-154095-8