Mamet, B.; Isaacson, P. E. (1997). Bashkirian (early Pennsylvanian) small foraminifers from Bolivia, in CLVII Proceeding of the XIII International Congress on the Carboniferous and Permian: Krakow. Prace Panstwowego Instytutu Geologicznego. 157: 319-328.
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Mamet, B.; Isaacson, P. E.
1997
Bashkirian (early Pennsylvanian) small foraminifers from Bolivia, in CLVII Proceeding of the XIII International Congress on the Carboniferous and Permian: Krakow