http://book.klll.cc/ebooks/author/51255.opds?sort_order=title 2025-11-18T13:26:20Z Books by Kirchhoff, Alfred Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-18T13:26:20Z https://de.wikipedia.org/wiki/Alfred_Kirchhoff See also: de.wikipedia 2025-11-18T13:26:20Z https://en.wikipedia.org/wiki/Alfred_Kirchhoff See also: en.wikipedia 2025-11-18T13:26:20Z https://book.klll.cc/ebooks/61101.opds Mensch und Erde: Skizzen von den Wechselbeziehungen zwischen beiden (German) Alfred Kirchhoff