http://book.klll.cc/ebooks/author/32540.opds?sort_order=release_date 2026-01-13T17:26:59Z Books by Hecker, Ewald Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2026-01-13T17:26:59Z https://en.wikipedia.org/wiki/Ewald_Hecker See also: en.wikipedia 2026-01-13T17:26:59Z https://book.klll.cc/ebooks/27205.opds Die Physiologie und Psychologie des Lachens und des Komischen. (German) Ewald Hecker