books.google.comhttp://books.google.com/books/about/Refining_Synthetic_Liquids_from_Coal_and.html?id=jZUrAAAAYAAJ&utm_source=gb-gplus-shareRefining Synthetic Liquids from Coal and Shale
Refining Synthetic Liquids from Coal and Shale: Final Report of the Panel on R&D Needs in Refining of Coal and Shale Liquids, Energy Engineering Board, Assembly of Engineering