Berry, W. (1930). The Larger Foraminifera of the Atascadero Limestone of North-West Peru, S. America. Eclogae Geologicae Helvetiae. vol. 23, no. 2, p. 489—496.
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Berry, W.
1930
The Larger Foraminifera of the Atascadero Limestone of North-West Peru, S. America