Publisher: [Harrisburg, 1959]
Description: [15] p. fold. col. map. 23 cm.
Notes: Caption title; Consists of booklet and folded map in envelope which has title: Geology of the Precambrian rocks and Hardyston formation of the Boyertown quadrangle; "References cited": p. [14]-[15]; Clarion University Faculty Publication.
Series: Atlas (Pennsylvania. Bureau of Topographic and Geologic Survey) ; no. 197.
