Barnes, V.E., Eifler, G.K., Trauger, F.D., Spiegel, Z., Hawley, J.W., Dillon, R.L., Kottlowski, F.E., Hood, C., and Grant, W.D., 1983, Geologic atlas of Texas, Tucumcari sheet: University of Texas at Austin, Bureau of Economic Geology, Geologic Atlas of Texas 34, scale 1:250,000