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Balech, E. (1975). La famillia Undellidae (Protozoa, Ciliophora, Tintinnina). Physis, Seccion A,. 34:377-398.
Balech, E. (1975). La famillia Undellidae (Protozoa, Ciliophora, Tintinnina). Physis, Seccion A,. 34:377-398.