Bryan, K. (1927). Pedestal rocks formed by differential erosion. Gov. Print. Off..
Cita Chicago Style (17a ed.)Bryan, Kirk. Pedestal Rocks Formed by Differential Erosion. Washington, D.C.: Gov. Print. Off., 1927.
Cita MLA (8a ed.)Bryan, Kirk. Pedestal Rocks Formed by Differential Erosion. Gov. Print. Off., 1927.
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