545,741 UPPER Upper GI [gastro-intestinal] tract cancer : research frontiers and direction of progress : lectures given at the 1987 Nordic Postgraduate Oncology Seminar / ed. by Larsolof Hafstrom. — [Stockholm : Almqvist and W i k s e H , 1988]. — 87 s. : il., wykr. ; 25 cm (Acta Chirurgica Scandinavica, ISSN 0301-1860, suppl. 541)