MGDS References
Shaw, A.M., D.R. Hilton, T.P. Fischer, J.A. Walker and G.A.M. de Leeuw, "Helium isotope variations in mineral separates from Costa Rica and Nicaragua: Assessing crustal contributions, time-scale variations and diffusion-related mechanisms", Chemical Geology, 230: 124-139, 2006, DOI 10.1016/j.chemgeo.2005.12.003. (View Reference)
