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Reward conditions and socioeconomic status in the learning ..:

, In: The journals of gerontology / the Gerontological Society of America. James E. Birren, ed.-in-chief
Erber, Joan ; Feely, Christine ; Botwinick, Jack. (1980)  4 - p. 565-570
Exemplar:  Zentrale:Magazin Zs fb 2317