Helm, Roger (1985): Mineralogy and diagenesis of slope sediments offshore Guatemala and Costa Rica, Deep Sea Drilling Project Leg 84. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: von Huene, Roland, Aubouin, Jean, Arnott, Robert J., Baltuck, Miriam, Bourgois, Jacques, Helm, Roger, Ogawa, Yujiro, Kvenvolden, Keith A., McDonald, Thomas J., Taylor, Elliott, McDougall, Kristin, Filewicz, Mark V., Winsborough, Barbara, Lienert, Barry, Orlofsky, Susan (editor), Initial reports of the Deep Sea Drilling Project covering Leg 84 of the cruises of the Drilling Vessel Glomar Challenger; Balboa, Panama, to Manzanillo, Mexico, January-February 1982, 84, 571-594, georefid:1985-069872