http://book.klll.cc/ebooks/subject/41695.opds 2025-09-24T18:54:32Z Books about Ability -- Testing (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 2025-09-24T18:54:32Z https://book.klll.cc/ebooks/76891.opds The accomplishment ratio : A treatment of the inherited determinants of disparity in school product Raymond Franzen