http://book.klll.cc/ebooks/author/51605.opds 2025-08-26T09:21:44Z Books by Babbitt, Harold E. (Harold Eaton) (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 2025-08-26T09:21:44Z https://book.klll.cc/ebooks/61773.opds Sewerage and Sewage Treatment Harold E. Babbitt