[RELATION OF TIME OF DELIVERY AND PREMATURE LABOR TO AIR MASSES].
D003604:Czechoslovakia; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007234:Infant, Premature; D007743:Labor, Obstetric; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D014887:Weather
CZECHOSLOVAKIA; INFANT, PREMATURE; LABOR; PREGNANCY; WEATHER
ABHAENGIGKEIT DER GEBURTEN UND VORZEITIGEN GEBURTEN VON DEN LUFTMASSEN.