Krutzsch et al., 1960

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Krutzsch, W., Pchalek, J. and Spiegler, D., 1960: Tieferes Paläozän (?Montien) in Westbrandenburg. Proceedings of the International Geological Congress, XXI Session, Copenhagen, 1960, Part VI, Pre-Quaternary Micropaleontology, p.135-143, pl.1-2.