Author: Öpik, A. A.
Title: Middle Cambrian agnostids: Systematics amd biostratigraphy. Volume 1: Text - Volume 2: Plates. [Complete].
Description: Canberra, Bureau of Mineral Resources, Geology and Geophysics, 1979. Two parts in two. 8vo. xi, 188 pp.; 67 plates. Original uniform printed wrappers. = A detailed monograph which inludes many new species and higher taxa, including a new subfamily. Text volume with errata leaf loosely inserted. A verygood, clean and unmarked set.

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