[Efficiency of selected methods of health-education in the 1st, 2nd and 3rd grade of primary school].
D002648:Child; D005260:Female; D006266:Health Education; D006801:Humans; D008297:Male; D011044:Poland; D012572:School Health Services
Skuteczność wybranych metod pracy oświatowo-sanitarnej prowadzonej. w I, II i 3 klasie szkoły podstawowej.