,520,402 PREGEL BORIS /red./ Public policy toward environment 1973: a review and appraisal.The Continuation Committee, International Joint Conference of the American Division of the World Academy of Art and science and the American Geographical Society, and The Hew York Academy of Sciences Ed. advisory board Boris Pregel /i in./ New York 1973 8° s.202,ilustr. Annals of the New York Academy of Sciences, vol.216.