Michel, H. V.; Asaro, R. F.; Alvarez, W.; Alvarez, Luis W.; Johnson, David A. (1983): Abundance profiles of iridium and other elements near the Cretaceous/Tertiary boundary in Hole 516F of Deep Sea Drilling Project Leg 72. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Barker, Peter F., Johnson, David A., Carlson, Richard L., Cepek, Pavel, Coulbourn, William T., Gamboa, Luiz A., Hamilton, Norman, de Melo, Ubirajara, Pujol, Claude, Shor, Alexander N., Suzyumov, Alexey E., Tjalsma, Leonard R. C., Walton, William H., Whalen, Elizabeth (editor), Initial reports of the Deep Sea Drilling Project covering Leg 72 of the cruises of the drilling vessel Glomar Challenger, Santos, Brazil to Santos, Brazil, February-April, 1980, 72, 931-936, georefid:1984-034773