http://book.klll.cc/ebooks/author/32540.opds 2025-08-11T23:45:09Z Books by Hecker, Ewald (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-11T23:45:09Z https://en.wikipedia.org/wiki/Ewald_Hecker See also: en.wikipedia 2025-08-11T23:45:09Z https://book.klll.cc/ebooks/27205.opds Die Physiologie und Psychologie des Lachens und des Komischen. (German) Ewald Hecker