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*24500$aFourth report of the Committee on economy on time in education$cby F.C. Ayer ... [et al.]
*260  $aBloomington, Ill.$bPublic School Pub.Co.$c1919
*4901 $aYearbook of the National Society for the Study of Education$v18:2
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*7001 $aAyer, F.C.$0(NO-TrBIB)2016640$_98663100
*7400 $aEconomy on time in education
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