Behre, Chas. H. <br/><br/>
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 .
 - Bulletin M,  9. .
<br/><br/> At head of title: Pennsylvania Geological Survey, fourth series.  Two folded plates and folded maps in pocket. 
<br/><br/>Bibliographical foot-notes. 
<br/><br/><label>LCCN: </label>gs 27000131  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slate--Pennsylvania--Northampton County.<br/>Geology--Pennsylvania--Northampton County.
<br/><br/><label>LC Class. No.: </label>TN958  / .B4