http://book.klll.cc/ebooks/subject/51.opds?start_index=76 2025-11-18T14:38:25Z Books about Science Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 76 2025-11-18T14:38:25Z https://book.klll.cc/ebooks/69320.opds Aus der Schneegrube (German) Wilhelm Bölsche 2025-11-18T14:38:25Z https://book.klll.cc/ebooks/37427.opds Scientific Culture, and Other Essays Jr. Josiah P. Cooke 2025-11-18T14:38:25Z https://book.klll.cc/ebooks/76878.opds Von Sonnen und Sonnenstäubchen : Kosmische Wanderungen (German) Wilhelm Bölsche