[Some problems of rational preventive care of children in the preschool age].
D002675:Child, Preschool; D003604:Czechoslovakia; D005260:Female; D006801:Humans; D008297:Male; D010372:Pediatrics; D011315:Preventive Medicine
Nĕkteré otázky systematické preventivní péce o dĕti predskolního vĕku.