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1by Hinte, J. E. van
Published 1963Wien : Geologische Bundesanstalt, 1963.147 p., 2, 22 leaves of plates : ill. ; 24 cm. -
2by Zwaan, G. J. van der
Published 1982Utrecht, Netherlands : State University of Utrecht, Dept. of Stratigraphy and Paleontology, 1982.183, [15] p. : ill. ; 29 cm.