Linder, R. A., Durham, J. W. & Orr, W. N. 1988. New Late Oligocene echinoids from the central Western Cascades of Oregon. Journal of Paleontology 62, 945-958.
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Linder, R. A.; Durham, J. W.; Orr, W. N.
1988
New Late Oligocene echinoids from the central Western Cascades of Oregon