prepared by the Railway Association of Canada in partnership with Environment Canada ; for the Transportation Systems Branch, Air Pollution Prevention Directorate, Environment Canada
prepared by the United States Environmental Protection Agency, Region V and Wisconsin Department of Natural Resources with the assistance of ESEI - Ecolsciences Environmental Group
sponsored by the American Institute of Biology and the Applied and Aquatic Section of the Ecological Society of America and ASTM Committee E-47 on Biological Effects and Environmental Fate, Grand Forks, ND, 8 Aug. 1983 ; Terence P. Boyle, editor