Twelfth Oil Shale Symposium Proceedings Colorado School of Mines Published: 1979 Total Pages: 395 Get eBook
Proceedings of the National Oil Shale Conference of the American Mining Congress, Cleveland, Ohio, October 9-14, 1922 Published: 1922 Total Pages: 72 Get eBook
Proceedings of the National Oil Shale Conference, October 2, 1924, Sacramento, Calif. in Connection with the American Mining Congress Published: 1924 Total Pages: 108 Get eBook
