Library of Congress (Etats-Unis)

• The National Union catalog pre-1956 imprints
• Accessions List
• G.K. Hall bibliographic guide to psychology
• G.K. Hall bibliographic guide to psychology
• The National Union catalog of manuscript collections
• The National Union catalog pre-1956 imprints
• The National Union catalog pre-1956 imprints
• The National Union catalog pre-1956 imprints
• The National Union catalog pre-1956 imprints