MacFadden, B.J., Campbell, K.E., Cifelli, R.L., Siles, O., Johnson, N.M., Naesser, C.W. and Zeitler, P.K. (1985). Magnetic polarity stratigraphy and mammalian fauna of the Deseadan (Late Oligocene-Early Miocene) Salla Beds of Northern Bolivia. Journal of Geology 93: 223-250. |
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