1. Tertiary maples of eastern Asia;Akhmetiev;Paleontological Journal,1971
2. Additions to the Tertiary Ruby Paper Shale flora of Southwestern Montana;Becker;Bulletin of the Torrey Botanical Club,1960
3. Oligocene plants from the Upper Ruby River Basin, Southwestern Montana;Becker;Geological Society of America Memoir,1961
4. Fossil plants of the Tertiary Beaverhead Basins in Southwestern Montana;Becker;Palaeontographica,1969
5. A revision of the flora of the Latah Formation;Berry;U.S. Geological Survey Professional Paper,1929