At: Monographs of the United States Geological Survey, 1883, 6 By: Fontaine W.
journalAt: Bulletin of the Torrey Botanical Club, 33, 3 By: Berry E. W.
journalAt: Bulletin of the Torrey Botanical Club, 34, 4 By: Berry E. W.
journalAt: Bulletin of the Torrey Botanical Club, 36, 5 By: Berry E. W.
journalAt: Bulletin of the Torrey Botanical Club, 37, 1 By: Berry E. W.
journalAt: Bulletin of the Torrey Botanical Club, 37, 4 By: Berry E. W.
journalAt: Bulletin of the Torrey Botanical Club, 37, 10 By: Berry E. W.
journalAt: Bulletin of the Torrey Botanical Club, 38, 9 By: Berry E. W.
bookAt: Contr. Micropalaeontol. Cambr.-Sil. Rocks Can., Ottawa, Maclean, Roger & Co., [1] By: Foord A. H.
journalAt: Bulletin of the Washburn Laboratory of Natural History, 2, 10 By: Cragin F. M.