Authors Year Title
Henry, Gordon & Schweinfurth 1985 Significance of the goniatite Bilinguites eliasi and associated biotas, Parkwood Formation and Bangor Limestone, northwestern Alabama. [T.W.Henry, M.Gordon, S.P. Schweinfurth & W.H.Gillespie].
Journal of Paleontology, 59 (5): 1138-1145, 4 fig., Lawrence, KS.