Opening address at the Fifth Conference of European Comparative Endocrinologists, Utrecht, The Netherlands, 24-29 August 1969.
D000818:Animals; D002816:Chordata, Nonvertebrate / Q000502:physiology; D004704:Endocrinology / Q000266:history*; D005399:Fishes / Q000502:physiology; D005768:Gastrointestinal Hormones / Q000378:metabolism; D049673:History, 20th Century; D009426:Netherlands; D010828:Physiology, Comparative / Q000266:history*
D005768:Gastrointestinal Hormones