http://book.klll.cc/ebooks/subject/28953.opds2025-11-14T09:13:21ZBooks about Geology -- Wyoming -- Devils Tower National MonumentFree eBooks since 1971.Project Gutenberghttps://book.klll.ccwebmaster@gutenberg.orghttps://book.klll.cc/gutenberg/favicon.ico2512025-11-14T09:13:21Zhttps://book.klll.cc/ebooks/49966.opdsGeology of Devils Tower National Monument, WyomingCharles Sherwood Robinson