00762cam a22002411 4500 gs 56000129 DLC 20260227111404.0 781030s1955 nmu 000 0 eng gs 56000129 (OCoLC)4331892 DLC TxEU DLC premarc TN24.N6 A235 no. 39 Armstrong, Augustus K. Preliminary observations on the Mississippian system of northern New Mexico. Socorro, 1955. 42 p. maps (1 fold.) diagrs. 28 cm. New Mexico. Bureau of Mines and Mineral Resources. Circular 39 "References": p. 41-42. Geology, Stratigraphic Mississippian. Geology New Mexico. 29046 29046