The American diceratheresPublished in Memoirs of the Carnegie Museum, in 1920, in volume 7, issue 6, pages 399-476Fossil plants from the beds of volcanic ash near Missoula, western MontanaPublished in Memoirs of the Carnegie Museum, in 1920, in volume 8, issue 2, pages 385-450
Fossil plants from the beds of volcanic ash near Missoula, western MontanaPublished in Memoirs of the Carnegie Museum, in 1920, in volume 8, issue 2, pages 385-450