Ebbinghaus, Hermann. — Über das Gedächtnis.

Amsterdam: E.J. Bonset,1966. Reprint 1885-ed. Orig. cloth binding. 169 pp. As new. Mailorder only - Alleen verzending mogelijk. Book condition : very good. - With nonsense syllables and poetry as materials, with himself as the sole subject, with the Erlernungsmethode and the Ersparnismethode as instruments he began his experimental measurement of memory. Finally in 1885 he published the epoch making report under the title: Über das Gedächtnis. ISBN 9789060310076.