Foraminifera source details
Brown, N. K. (1969). Heterohelicidae Cushman, 1927, amended, a Cretaceous planktonic foraminiferal family. In: Bronnimann, P. and Renz, H.H. (Editors), Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. Leiden, F. J. Brill.
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Brown, N. K.
1969
Heterohelicidae Cushman, 1927, amended, a Cretaceous planktonic foraminiferal family. In: Bronnimann, P. and Renz, H.H. (Editors), Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967.
Leiden, F. J. Brill
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Pseudotextularia cushmani Brown, 1969 † accepted as Pseudotextularia nuttalli (Voorwijk, 1937) † (original description)