http://book.klll.cc/ebooks/author/54215.opds?sort_order=downloads 2025-11-17T20:16:07Z Books by Playfair, John Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-17T20:16:07Z https://en.wikipedia.org/wiki/John_Playfair See also: en.wikipedia 2025-11-17T20:16:07Z https://book.klll.cc/ebooks/67331.opds Illustrations of the Huttonian Theory of the Earth John Playfair