Molecular and Isotopic Composition of Lipids in Bivalve Shells: Records of Biosynthetic Origins and Paleoenviron- mental ChangeCoBabe-Ammann, Emily and Pratt, LisaNational Science Foundation (NSF), Directorate for Geosciences, Division of Earth Sciences (ID: 9316279), $167,416USD, 02/01/1994 -- 01/31/1997