[Changes in school absences and educational measurement of urban and rural children during 6 years of elementary education].
D000041:Absenteeism; D002648:Child; D004521:Educational Measurement; D005260:Female; D006801:Humans; D008297:Male; D011044:Poland; D012424:Rural Population; D012574:Schools; D014505:Urban Population
Zmiany absencji i wyników w nauce u dzieci miejskich i wiejskich w okresie sześciu lat nauki w szkole podstawowej.