Comet, Paul A.; McEvoy, J.; Kennicutt, Mahlon C., II (1992): Bitumen classification and biomarker correlation studies based on organic extracts from Neogene Gulf of California sediments. Columbia University Press, New York, NY, United States, In: Whelan, Jean K. (editor), Farrington, John W. (editor), Organic matter; productivity, accumulation, and preservation in Recent and ancient sediments, 283-307, georefid:1994-032720