Thompson, Robert (1996). "Pliocene and early Pleistocene environments and climates of the western Snake River Plain, Idaho". Marine Micropaleontology. 27 (1–4): 141–156. Bibcode:1996MarMP..27..141T. doi:10.1016/0377-8398(95)00056-9.
Thompson, Robert (1996). "Pliocene and early Pleistocene environments and climates of the western Snake River Plain, Idaho". Marine Micropaleontology. 27 (1–4): 141–156. Bibcode:1996MarMP..27..141T. doi:10.1016/0377-8398(95)00056-9.