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Kimble, B.J.; Maxwell, J.R.; Philp, R.P.; Eglinton, G., Identification of steranes and triterpanes in geolipid extracts by high-resolution gas chromatography and mass spectrometry, Chem. Geol., 1974, 14, 3, 173-198, https://doi.org/10.1016/0009-2541(74)90127-2 . [all data]