1. The chemical and structural relationship of lignin to humic substances;Breger;Fuel,1951
2. The geochemistry of coal;Breger;Econ. Geol.,1958
3. Diagenesis of metabolites and discussion of the origin of petroleum hydrocarbons;Breger;Geochim. Cosmochim. Acta,1960
4. Organic Geochemistry,1963
5. What you don't know can hurt you: Organic colloids in natural waters;Breger,1970