197,661 ELECTRONMICROSCOPY Electronnicroscopy of the gastrointestinal tract. Proceedings of.the first symposium in a series on Basic Science in Gastroenterology. Royal Postgraduate Medical School Hammersmith Hospital London UK 7 April 1981 Ed. by: J. M. Polak [et al.] Oslo 1981 4 s. nlb. 4, 194, il. Scandinavian Journal of Gastroenterology, suppl. 70