Bougault, H.; Treuil, M.; Joron, J. L. (1979): Trace elements in basalts from 23 degrees N and 36 degrees N in the Atlantic Ocean; fractional crystallization, partial melting, and heterogeneity of the upper mantle. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Melson, W. G., Rabinowitz, P. D., Bougault, H., Fuji, T., Graham, A. L., Johnson, H. P., Natland, J. H., Prosser, E. C., Rhodes, J. M., Zolotarev, B. P., Initial reports of the Deep Sea Drilling Project Leg 45; San Juan, Puerto Rico to San Juan, Puerto Rico, 45, 493-506, georefid:1979-013291