http://book.klll.cc/ebooks/subject/30328.opds?sort_order=title 2025-11-18T15:36:14Z Books about Petroleum Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-18T15:36:14Z https://book.klll.cc/ebooks/52825.opds Petroleum Albert Lidgett 2025-11-18T15:36:14Z https://book.klll.cc/ebooks/61894.opds World-Struggle for Oil Pierre Paul Ernest L'Espagnol de la Tramerye