01147cam a22003131 4500 gs 56000256 DLC 20260227111404.0 811021m19009999enkabf b 000 0 eng c gs 56000256 U.S. Geol. Survey. Libr. DLC DLC e-uk-en QE821 .W43 565/.393 19 Whittard, W. F. (Walter Frederick), 1902-1966. The Ordovician trilobites of the Shelve Inlier, west Shropshire. London, Palæontographical Society, 19< -67> <307-352> p. illus., plates, map, table. 28 cm. Palaeontographical Society. Publication no. < > 516 Palaeontographical Society. [Monograph] Issued in parts. Issued as part of volume < > 121." Bibliography: p. 321-337. Trilobites England Salop. Paleontology Ordovician. Paleontology England Salop. Publication (Palaeontographical Society (Great Britain)) ; no. 516, etc. Palaeontographical Society monographs. 29084 29084