A CONTRIBUTION ON THE ECOLOGY OF MYCOPLASMA PNEUMONIAE INFECTIONS.
D000293:Adolescent; D002648:Child; D003604:Czechoslovakia; D004463:Ecology; D004813:Epidemiology; D006801:Humans; D007223:Infant; D007239:Infections; D009174:Mycoplasma; D009177:Mycoplasma pneumoniae
ADOLESCENCE; CHILD; CZECHOSLOVAKIA; EPIDEMIOLOGY; INFANT; INFECTION; MYCOPLASMA