Friedrichsen, Hans (1985): Strontium, oxygen, and hydrogen isotope studies on primary and secondary minerals in basalts from the Costa Rica Rift, Deep Sea Drilling Project Hole 504B, Leg 83. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Anderson, Roger N., Honnorez, Jose, Adamson, Andrew C., Alt, Jeffrey C., Emmermann, Rolf, Kempton, Pamela D., Kinoshita, Hajimu, Leverne, Christine, Mottl, Michael J., Newmark, Robin L., Becker, Keir, Initial reports of the Deep Sea Drilling Project, covering Leg 83 of the cruises of the Drilling Vessel Glomar Challenger, Balboa, Panama to Balboa, Panama, November 1981- January 1982, 83, 289-295, georefid:1985-059450