Note 67 — Chapter III · (continued 3)
Reading edition
Hayes. Physiography of the Chattanooga District, 19th Ann. Rep., U. S. Geol. Surv., Pt. II, pp. 9–58. See, also, Hayes and Campbell, Geomorphology of the Southern Appalachians, Nat’l Geog. Mag., Vol. VI, pp. 63–126.