http://book.klll.cc/ebooks/author/37401.opds?sort_order=release_date 2025-11-18T05:39:13Z Books by Lenzen, Victor F. (Victor Fritz) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-18T05:39:13Z https://en.wikipedia.org/wiki/Victor_Lenzen See also: en.wikipedia 2025-11-18T05:39:13Z https://book.klll.cc/ebooks/35024.opds Development of Gravity Pendulums in the 19th Century Robert P. Multhauf and Victor F. Lenzen