[Instruments, books and other objects memorable to (almost) forgotten opinions, therapies, buildings, etc. Gas mask for horses].
D000818:Animals; D049673:History, 20th Century; D006736:Horses; D009426:Netherlands; D012134:Respiratory Protective Devices / Q000266:history / Q000662:veterinary*; D014730:Veterinary Medicine / Q000266:history* / Q000295:instrumentation