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Geochimica Et Cosmochimica Acta, vol. 68, no. 8, pp. 1837-1856, 2004.
A. M. Shaw, Hilton, D. R., Fischer, T. P., Walker, J. A., and Alvarado, G. E.,
“Contrasting He-C relationships in Nicaragua and Costa Rica: insights into C cycling through subduction zones”,
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