543,865 PENA A.S. /red./ Cells of the gastrointestinal tract : isolation procedures and application in research / ed. by A.S, Pena j Department of Gastroenterology, University Medical Centre -?Stockholm Distributed by the Almqvist and Wiksell Periodical Co., 1985.- 155 s. : il wykr ; 24 cm (Acta Chirurgica Scandinavica ; suppl 525] ISSN 0301-1860