Search for: Title Author Subject Series that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # Fossil fuels 16 SEE ALSO narrower term: Coal. 104 SEE ALSO narrower term: Coal. 104 SEE ALSO narrower term: Gas as fuel 6 SEE ALSO narrower term: Shale oils 12 Fossil fuels -- Black Kettle National Grassland (Okla. and Tex.) -- Management. 1 Fossil fuels -- Colorado -- History -- 19th century. 1 Fossil fuels -- Colorado -- History -- 20th century. 1 Fossil fuels -- Combustion -- By-products -- Law and legislation -- United States. 1 Fossil fuels -- Comic books, strips, etc. 2 Fossil fuels -- Economic aspects. 1 Fossil fuels -- Environmental aspects. 15 Fossil fuels -- Environmental aspects -- Juvenile fiction. 1 Fossil fuels -- Environmental aspects -- Juvenile literature. 7 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >