1. Carbon isotope fractionation of amino acids by photosynthetic organisms;Abelson,1961
2. Pyrolysis technique for source-rock evaluation;Barker;Bull. Am. Ass. Pet. Geol.,1974
3. Programmed-temperature pyrolysis of vitrinites of various ranks;Barker;Fuel,1974
4. Carbon isotopes in pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado;Barker;Bull. Geol Soc. Am.,1969
5. Chemical structure and properties of coal XVIII-oxygen groups in coal and related products;Blom;Fuel,1957