A soil microbiologist's odyssey.
D000596:Amino Acids / Q000378:metabolism; D000900:Anti-Bacterial Agents / Q000266:history; D049673:History, 20th Century; D010406:Penicillins / Q000266:history; D012958:Societies, Scientific / Q000266:history; D012988:Soil Microbiology; D013307:Streptomycin / Q000266:history; D014481:United States; D014805:Vitamin B 12 / Q000266:history
D000596:Amino Acids; D000900:Anti-Bacterial Agents; D010406:Penicillins; D014805:Vitamin B 12; D013307:Streptomycin