Variable-Temperature EPR Studies of Illinois No. 6 Coal Treated with Donor and Acceptor Molecules von Thompson, Robert L, Rothenberger, Kurt S, Retcofsky, Herbert L

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Temperature dependence of the electron spin resonance spectra of a coal-derived vacuum distillation residue and components von Castellano, Salvatore M, Chisholm, William P, Sprecher, Richard F, Retcofsky, Herbert L

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13C 1H Cross-polarization nuclear magnetic resonance spectra of macerals from coal von Retcofsky, Herbert L., VanderHart, David L.

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Nature of the electron paramagnetic resonance intensity in iodine treated coals von Rothenberger, Kurt S., Sprecher, Richard F., Retcofsky, Herbert L., Wangi, Wei, Clarkson, R.B., Belford, R.L.

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Observation of transient free radicals during coal pyrolysis von Sprecher, Richard F., Retcofsky, Herbert L.

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Changes in hydrogen utilization with temperature during direct coal liquefaction von Finseth, Dennis H., Cillo, Daniel L., Sprecher, Richard F., Retcofsky, Herbert L., Lett, Richard G.

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