Barrett, Timothy J. (1983): Strontium- and lead-isotope composition of some basalts from Deep Sea Drilling Project Hole 504B, Costa Rica Rift, legs 69 and 70. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Cann, J. R., Langseth, Marcus G., Honnorez, Jose, Von Herzen, Richard P., White, S. M., Bacon, Michael P., Anderson, Roger N., Lawrence, James R., Natland, James H., Nekhoroshkov, Vladislav L., Pertsev, Nikolai N., Ponomarev, Vladimir N., Zoback, Mark D., Adamson, A. C., Barrett, Timothy J., Becker, Keir, Beiersdorf, Helmut, Bender, Michael, Borella, Peter E., Furuta, Toshio, Hubberten, Hans-Wolfgang, Jones, Steven C., Karato, Shun-ichiro, Laverne, Christine, Levi, Shaul, Migdisov, Areg G., Moorby, S. Anthony, Mottl, Michael J., Noack, Yves, Sancetta, Constance A., Schrader, Edward L., Wilkens, Roy H., Stout, Larry N. (editor), Bailey, Marian G. (editor), Initial reports of the Deep Sea Drilling Project covering Leg 68 (Site 501), Leg 69, and Leg 70 (Site 504) of the cruises of the drilling vessel Glomar Challenger, Puntarenas, Costa Rica to Balboa, Panama, July-December 1979, 69, 643-650, georefid:1983-052523