http://book.klll.cc/ebooks/author/47058.opds?sort_order=release_date 2026-01-13T02:13:42Z Books by Ebbinghaus, Hermann Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2026-01-13T02:13:42Z https://en.wikipedia.org/wiki/Hermann_Ebbinghaus See also: en.wikipedia 2026-01-13T02:13:42Z https://book.klll.cc/ebooks/52823.opds Psychology: an elementary text-book Hermann Ebbinghaus