Accompanied by 2 foldout plates -- Plate 1 : Geologic Map of the Pennsylvanian Area in North Central Texas. Plate 2 : Stratigraphic Sections of the Pennsylvanian of North-Central Texas. Includes bibliographical references and index."Bureau of Economic Geology and Technology, Division of Economic Geology."University of Texas bulletin ; no. 2132 : June 5, 1921
237 p., 25 leaves of plates : ill., maps (1 in pocket) ; 31 cm.