300,494 AMERICAN American College of Chest Physician: 56th Annual Scientific Asembly October 22-26, 1990 Toronto Metro Convention Centre and The Sheraton Centre Hotel and Towers : Meeting Highlights : Abstracts of Original Investigations. - Chicago : American College of Ches Physicains, 1990. - [12], 143, [1] s. ; il. ; 28 cm (Chest, ISSN 0012-3692 ; vol. 98, nr 2, suppl.)