title: Experiments in border disease. V. Preliminary investigations on the nature of the agent.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D005019:Ethyl Ethers; D005260:Female; D005374:Filtration; D006358:Hot Temperature; D009186:Myelin Sheath; D009417:Nerve Tissue / Q000382:microbiology; D010920:Placenta; D010922:Placenta Diseases / Q000209:etiology; D011247:Pregnancy; D012328:RNA Viruses / Q000302:isolation & purification*; D012756:Sheep; D012757:Sheep Diseases / Q000209:etiology*; D012995:Solubility
chemical_list: D005019:Ethyl Ethers