Wolf, Monika (1982): Coal petrological studies of sediments from sites 496, 499, and 500, Deep Sea Drilling Project Leg 67, Middle America Trench and slope off Guatemala. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Aubouin, Jean, von Huene, Roland, Azema, Jacques, Coulbourn, William T., Cowan, Sarrel S., Curiale, Joseph A., Dengo, Carlos A., Faas, Richard W., Harrison, William E., Hesse, Reinhard, Ladd, John W., Muzylov, Nikita, Shiki, Tsunemasa, Thomson, Peter R., Westberg, M. Jean, Orlofsky, Susan (editor), Initial Reports of the Deep Sea Drilling Project covering Leg 67 of the cruises of the drilling vessel Glomar Challenger, Manzanillo, Mexico to Puntarenas, Costa Rica, 67, 601-602, georefid:1983-011518