http://book.klll.cc/ebooks/author/47357.opds?sort_order=release_date 2025-11-16T05:12:29Z Books by Jacoby, Harold Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-16T05:12:29Z https://en.wikipedia.org/wiki/Harold_Jacoby See also: en.wikipedia 2025-11-16T05:12:29Z https://book.klll.cc/ebooks/53396.opds Practical Talks by an Astronomer Harold Jacoby