1. Fossil plants from the San Francisco Bay region;Axelrod,1971
2. Contributions to the Neogene paleobotany of Central California;Axelrod;Univ. Calif. Publ. Geol. Sci.,1980
3. A field morphology rating scale for evaluating pedological development;Bilzi;Soil Sci.,1977
4. Soils and Geomorphology;Birkeland,1984
5. Holocene soil chronofunctions, Southern Alps, New Zealand;Birkeland;Geoderma,1985