804,133 AMMONIA Ammonia emissions to air In Western Europe July 1994 / ECETOC [European Centre for Ecotoxicology and Toxicology of Chemicals). - Brussels t ECETOC, 1994. -[2], VII, 196 s. : il. , 30 cm (Technical Report / ECETOC, ISSN 0773-8072-62 , no.62)