http://book.klll.cc/ebooks/subject/31032.opds 2025-09-02T17:59:06Z Books about Metric system (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 2025-09-02T17:59:06Z https://book.klll.cc/ebooks/54208.opds Standard Measures of United States, Great Britain and France Arthur S. C. Wurtele