BASSLER, RAY SMITH - Report on the Cambrian and Ordovician formations of Maryland.

1919. Maryland Geol. Surv. Baltimor, Spec. Publ.e. 424 pp. 27 fig. 58 plts. h.t. (plts. 24-58 with fossils, plt. 1: col. map, remainder views and rock outcrops). Orig. wrps. faint libr. stamp on front cover and first endpaper, top of spine lacks small chip, otherwise, and contents very good.