Hormonal receptors in digestive tract physiology : proceedings of the First International Symposium on Hormonal Receptors in Digestive Tract Physiology, held in Abbaye de Royaumont (France), 22-24 September, 1976 ) - Bonfils, Serge, 1923-2013; Fromageot, Pierre, 1926-; Rosselin, G. (INSERM symposium ;, 1977)