http://book.klll.cc/ebooks/subject/16572.opds 2025-08-14T16:41:28Z Books about Invariants (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 2025-08-14T16:41:28Z https://book.klll.cc/ebooks/9933.opds A Treatise on the Theory of Invariants Oliver E. Glenn