“…An extensive series of papers by Mangold between 1906 and (for reviews, see Mangold, 1950;Farner, 1960) contributed much to knowledge of physiology of digestion in birds; Nolf, from 1925Nolf, from to 1939Nolf, from (e.g., 1927Nolf, from , 1934Nolf, from , 1938 contributed important studies on the control of the digestive system by the autonomic nervous system (for reviews, see Farner 1960;Bennett, 1974). Others are cited by Ziswiler and Farner (1972) and by McLelland (1979).…”