[On request from the editor: "Letter to a student friend"].
van der Wal
G
G
D000818:Animals; D002417:Cattle; D036861:Delivery, Obstetric / Q000266:history / Q000662:veterinary*; D004520:Education, Veterinary / Q000266:history; D005260:Female; D049673:History, 20th Century; D006736:Horses; D006801:Humans; D007315:Insemination, Artificial / Q000266:history / Q000662:veterinary*; D008297:Male; D011247:Pregnancy; D011270:Pregnancy, Animal; D018634:Veterinarians / Q000266:history*