Studies on paleobiology in view of the paleological development of the terrestrial atmosphere.
D000337:Aerospace Medicine; D000391:Air Microbiology; D001272:Atmosphere; D001359:Aviation / Q000009:adverse effects* / Q000473:pathology* / Q000502:physiology*; D001432:Bacteriology
AIR/bacteriology; AVIATION AND AVIATORS/physiologic and pathologic effects