http://book.klll.cc/ebooks/author/6809.opds 2025-08-06T10:00:51Z Books by Clark, Bertha May (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 2025-08-06T10:00:51Z https://book.klll.cc/ebooks/16593.opds General Science Bertha May Clark