http://book.klll.cc/ebooks/subject/23453.opds?sort_order=downloads 2025-08-16T20:12:11Z Books about Mental retardation (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 2025-08-16T20:12:11Z https://book.klll.cc/ebooks/subject/23453.opds?sort_order=title Sort Alphabetically by Title 2025-08-16T20:12:11Z https://book.klll.cc/ebooks/subject/23453.opds?sort_order=release_date Sort by Release Date 2025-08-16T20:12:11Z https://book.klll.cc/ebooks/53958.opds The Kallikak Family: A Study in the Heredity of Feeble-Mindedness Henry Herbert Goddard 2025-08-16T20:12:11Z https://book.klll.cc/ebooks/39670.opds The Idiot: His Place in Creation, and His Claims on Society Sir Frederick Bateman