1. Organic geochemistry and the formation of petroleum;Abelson,1963
2. Organic matter in the Earth's crust;Abelson,1978
3. Analytical approaches to the investigation of kerogen structure by mass spectrometric techniques;Brown,1980
4. The origin and formation of oil shale;Cane,1976
5. Molecular fossils of Archaebacteria as selective degradation products of kerogen;Chappe,1980