1. Recent origin of amino acids in the Gunflint Chert;Abelson,1968
2. The Bacterial Lipids;Asselineau,1966
3. Occurrence of biogenic steranes and pentacyclic triterpanes in an Eocene shale and in an Early Precambrian shale: a preliminary report;Burlingame,1965
4. A postulated role of fatty acids in petroleum formation;Cooper;Geochim. Cosmochim. Acta,1963
5. Advances in Organic Geochemistry 1966;Douglas,1969