http://book.klll.cc/ebooks/author/34023.opds 2025-08-20T11:20:43Z Books by Klapper, Paul (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-20T11:20:43Z https://en.wikipedia.org/wiki/Paul_Klapper See also: en.wikipedia 2025-08-20T11:20:43Z https://book.klll.cc/ebooks/29604.opds College Teaching Paul Klapper