[Absenteeism among 6-year-old children attending preschool classes in cities and rural communities].
D000041:Absenteeism; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009017:Morbidity; D011044:Poland; D012578:Schools, Nursery
Absencja dzieci sześcioletnich uczeszczajacych do klas zerowych w miastach i gminach.