1. Age-curve analysis of angiosperm floras;Axelrod;J. Paleontol.,1957
2. The cambium and its der'vative tissues, 9. Structural variability in the redwood Sequoia sempervirens, and its significance in the identification of fossil woods;Bailey;J. Arnold Arboretum (Harvard Univ.),1934
3. Age and environment: a survey of North American Tertiary floras in relation to paleoecology;Barghoorn;J. Paleontol.,1951
4. Quantitation of sequential change in North American Cenozoic floras as a clue to palaeoclimates;Barghoorn,1964
5. Das Pliozän von Allerhausen (Solling, Niedersachsen);Benda;Palaeontographica, B,1968