[On the problem of the method of studying the socio-economic conditions of little children].
D002675:Child, Preschool; D004777:Environment; D005260:Female; D006128:Growth; D006801:Humans; D007223:Infant; D008297:Male; D011044:Poland; D012924:Social Conditions
W sprawie metodyki badania warunków społeczno-bytowych małego dziecka.