01086cam a22002771 4500 gs 27000131 DLC 20260227111331.0 760202s1927 pauabf b s000 0 eng c gs 27000131 (OCoLC)1962182 U.S. Geol. Survey. Libr. PSrS OCoLC DLC n-us-pa TN958 .B4 Behre, Chas. H. (Charles H.) Slate in Northampton County, Pennsylvania, by Charles H. Behre, Jr. Harrisburg, Pa., Dept. of Forests and Waters, Topographic and Geologic Survey, 1927. xii, 308 p. incl. illus., tables, diagrs. fold. plates, 2 fold. maps. 24 cm. Pennsylvania. Topographic and Geologic Survey. Bulletin M9 At head of title: Pennsylvania Geological Survey, fourth series. Two folded plates and folded maps in pocket. Bibliographical foot-notes. Slate Pennsylvania Northampton County. Geology Pennsylvania Northampton County. Bulletin M, 9. 26556 26556