12.335 Experimental Atmospheric Chemistry
12.104 Introduction to Geochemistry
12.490 Current Topics in Stable Isotope Geochemistry
12.092 and 12.490 Stable Isotope Geochemistry and Biogeochemical Cycles
12.490 and 12.092, Current topics in Astrobiology and Geobiology
12.491, Biogeochemistry of Sulfur