Chapter Alexander, Nancy (1979)
The work of Edwin Theodore Dumble on the East Texas lignite deposits (1888-1892). In: Two hundred years of geology in America. Proceedings of the New Hampshire Bicentennial Conference on the History of Geology (p. 213). (/p/isis/citation/CBB000008503/) unapi

Book Alexander, Nancy (1976)
Father of Texas geology: Robert T. Hill. (/p/isis/citation/CBB000012587/) unapi

Article Alexander, Nancy (1975)
Running the Rio Grande Canyons: Robert T. Hill in the Big Bend. Southwest Review (pp. 128-142). (/p/isis/citation/CBB000011693/) unapi