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- ebrary, Inc140
- Oxford University Press69
- Piaget, Jean, 1896-198037
- Project Muse33
- ProQuest (Firm)25
- Anderson, John R. (John Robert), 1947-22
- Harvard-Smithsonian Center for Astrophysics. Science Media Group, production company19
- Sternberg, Robert J.19
- Annenberg Learner (Firm), publisher18
- Wyer, Robert S.18
- Craik, Fergus I. M.15
- Salthouse, Timothy A.14
- SpringerLink (Online service)14
- Fodor, Jerry A.13
- American Psychological Association12
- Forgas, Joseph P.12
- Solso, Robert L., 1933-12
- Srull, Thomas K.12
- Chater, Nick11
- Humphreys, Glyn W.11