Blaustein, B. D., Bockrath, B. C., & Friedman, S. (1981). New approaches in coal chemistry. American Chemical Society.
Lua i Stíl Chicago (17ú heag.)Blaustein, Bernard D., Bradley C. Bockrath, agus Sidney Friedman. New Approaches in Coal Chemistry. Washington, DC: American Chemical Society, 1981.
Lua MLA (9ú heag.)Blaustein, Bernard D., et al. New Approaches in Coal Chemistry. American Chemical Society, 1981.
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