http://book.klll.cc/ebooks/subject/21245.opds2025-09-03T15:32:30ZBooks about Language and languages -- Study and teaching (sorted by popularity)Free eBooks since 1971.Project Gutenberghttps://book.klll.ccwebmaster@gutenberg.orghttps://book.klll.cc/gutenberg/favicon.ico2512025-09-03T15:32:30Zhttps://book.klll.cc/ebooks/46961.opdsThe Principles of Language-StudyHarold E. Palmer