Thompson, Marcus Luther, 1906- Pennsylvanian system in New Mexico. - Socorro, 1942. - 92 p. 2 maps (1 fold.) 23 cm. Bibliography: p. 84-85. LCCN: gs 43000009 Subjects--Topical Terms: Geology, Stratigraphic--Pennsylvanian.Geology--New Mexico. LC Class. No.: TN24.N6 / A232 no. 17 Dewey Class. No.: 551.75