1. Determination of chlorophyll content of a sample of Walvis Bay sediment;Aldershoff,1951
2. The absorption spectra of chlorophyll and related compounds;Aronoff;Chem. Rev.,1950
3. Chemische Unteruchungen an bituminösen Gesteinen;Blumer;Bull. Ver. Schweizer. Petrol-Geol. v. Ing.,1952
4. Properties of porphyrins in petroleum;Dunning;Industr. Engng. Chem.,1954
5. Early diagenesis of California basin sediments in relation to origin of oil;Emery;Bull. Amer. Assoc. Pet. Geol.,1952