Simkin, T., Unger, J. D., Tilling, R. I. 1., Vogt, P. R. 1., Spall, H., Queen, J. E., . . . Mathieux, P. (1994). This dynamic planet: World map of volcanoes, earthquakes, impact craters, and plate tectonics. [Estados Unidos]: Department of the Interior, U. S. Geological Survey.

Simkin, Tom, John D. Unger, Robert I. 1935- Tilling, Peter Richard 1939- Vogt, Henry Spall, James E. Queen, Will R. Stettner, and Paul Mathieux. This Dynamic Planet: World Map of Volcanoes, Earthquakes, Impact Craters, and Plate Tectonics. [Estados Unidos]: Department of the Interior, U. S. Geological Survey, 1994.

Simkin, Tom, et al. This Dynamic Planet: World Map of Volcanoes, Earthquakes, Impact Craters, and Plate Tectonics. [Estados Unidos]: Department of the Interior, U. S. Geological Survey, 1994.