Sztejn, J. (1988). Benthic Foraminifera from the Ryazanian and Lower Valanginian in the Polish lowlands. Revue de Paléobiologie, Volume spécial. 2(1): 339-346.
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Sztejn, J.
1988
Benthic Foraminifera from the Ryazanian and Lower Valanginian in the Polish lowlands.
Revue de Paléobiologie, Volume spécial