545,451 BERGAN TOM [red.] International symposium on ecological impacts of antibacterial agents Stockholm, Match 7-8, 1986 / ed. by Tom Bergan, Bertil Ekstrom and Carl Erik Nord. — [Stockholm : Almqvist and Wiksell Periodical Company, 1986]. — 205 s. : il., wykr. ; 25 cm (Scandinavian Journal of Infectious Diseases, ISSN 0300-8878 ; suppl. 49)