- Osborne, Robert H.1
- Outerbridge, William F.1
- Pennsylvania. Bureau of Topographic and Geologic Survey1
- Peterson, Warren Lee, 1925-1
- Pierce, William Gamewell, 1904-1
- Radbruch-Hall, Dorothy H., 1920-1
- Ratzer, Bernard1
- Reed, John Calvin, 1930-1
- Reed, Philip C.1
- Roen, John B.1
- Roscoe, S. M.1
- Rubey, William Walden, 1898-19741
- Sargent, Kenneth A.1
- Sāzmān-i Zamīnʹshināsī-i Kishvar1
- Schlee, John Stevens, 1928-1
- Schmoll, Henry R.1
- Schroeder, Marvin L.1
- Shown, L. M. (Lynn M.)1
- Silitonga, P. H.1
- Simmons, Gene1
GeoBlacklight version 4.1.0
