http://book.klll.cc/ebooks/author/44731.opds?sort_order=downloads 2025-11-15T11:41:51Z Books by Frege, Gottlob Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-15T11:41:51Z https://en.wikipedia.org/wiki/Gottlob_Frege See also: en.wikipedia 2025-11-15T11:41:51Z https://book.klll.cc/ebooks/48312.opds Die Grundlagen der Arithmetik (German) Gottlob Frege