http://book.klll.cc/ebooks/subject/1593.opds?sort_order=release_date 2025-11-16T05:16:18Z Books about Manufactures Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-16T05:16:18Z https://book.klll.cc/ebooks/28569.opds Makers of Many Things Eva March Tappan 2025-11-16T05:16:18Z https://book.klll.cc/ebooks/4238.opds On the Economy of Machinery and Manufactures Charles Babbage