http://book.klll.cc/ebooks/author/50132.opds?sort_order=downloads 2025-11-16T13:00:46Z Books by Preston, Frank W. Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-16T13:00:46Z https://en.wikipedia.org/wiki/Frank_W._Preston See also: en.wikipedia 2025-11-16T13:00:46Z https://book.klll.cc/ebooks/58747.opds Holcomb, Fitz, and Peate: Three 19th Century American Telescope Makers 317 downloads