http://book.klll.cc/ebooks/subject/7808.opds?sort_order=release_date 2026-01-13T14:48:13Z Books about Postal rates Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2026-01-13T14:48:13Z https://book.klll.cc/ebooks/34011.opds The Development of Rates of Postage: An Historical and Analytical Study A. D. Smith 2026-01-13T14:48:13Z https://book.klll.cc/ebooks/27196.opds Cheap Postage Joshua Leavitt