You may also wish to search for items by Leythaeuser.
Only one matching reference was found.
Schaefer, R.G.; Leythaeuser, D., Analysis of trace amounts of hydrocarbons (C2-C8) from rock and crude oil samples and its application in petroleum geochemistry, Phys. Chem. Earth, 1980, 12, 149-156, https://doi.org/10.1016/0079-1946(79)90097-1 . [all data]