Cushman, J. A.; Stevenson, F. V. (1948). A Miocene foraminiferal fauna from Ecuador. Contributions from the Cushman laboratory for foraminiferal research. 24(3): 50-68.
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Cushman, J. A.; Stevenson, F. V.
1948
A Miocene foraminiferal fauna from Ecuador
Contributions from the Cushman laboratory for foraminiferal research