http://book.klll.cc/ebooks/author/8822.opds?sort_order=release_date 2025-11-17T01:04:27Z Books by Ayres, Leonard Porter Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-17T01:04:27Z https://en.wikipedia.org/wiki/Leonard_Porter_Ayres See also: en.wikipedia 2025-11-17T01:04:27Z https://book.klll.cc/ebooks/19701.opds Health Work in the Public Schools Leonard Porter Ayres and May Ayres