title: Observations on man in an oxygen-helium environment at 380 mm. Hg. total pressure. V. Chromosome profiles.
mesh_terms: D000293:Adolescent; D000328:Adult; D001274:Atmospheric Pressure; D002875:Chromosomes; D018504:Ecological Systems, Closed; D004781:Environmental Exposure; D006371:Helium; D006801:Humans; D007621:Karyotyping; D008297:Male; D010100:Oxygen
chemical_list: D006371:Helium; D010100:Oxygen