1. Chemicals from coal and shale: An R. & D. analysis for National Science Foundation 1975
2. Adam D. E paper presented at the meeting of the American Institute of Chemical Engineers Philadelphia Pennsylvania November (1973).
3. THESIS MASSACHUSETTS 1974
4. BARTLE, K.D., CHEMICAL NATURE OF A SUPERCRITICAL-GAS EXTRACT OF COAL AT 350 DEGREESC, FUEL 54: 226 (1975).
5. Beyer G. H. presentation at University Contractors Conference Park City Utah October (19745).