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The effects of small classes on academic achievement: The r..:

Nye, Barbara ; Hedges, Larry V ; Konstantopoulos, Spyros
American educational research journal.  37 (2000)  1 - p. 123-151 , 2000
Link: https://doi.org/10.3102/00028312037001123
Exemplar:  Zentrale:E03 z pae 001 jc/277; Zentrale:Magazin Zs fc 5277