Author: Campbell, K.S.W., 1961.:
Title: New species on the Permian spiriferoids Ingelarella and Notospirifer from Queensland and their stratigraphic implications.
Description: Palaeonrogr., Abt. A, 117:: pp. 159-192, many photos on 6 plates, 13 figs., 3 tabs., refs. 4to. Plain new wrappers.

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