Clays and clay industries of Pennsylvania : I. Clays of Western Pennsylvania (in part) : description of the clays and clay industries in the Ohio, Monongahela, Youghiogheny and Conemaugh river valleys in Pennsylvania [...]
Clays and clay industries of Pennsylvania : I. Clays of Western Pennsylvania (in part) : description of the clays and clay industries in the Ohio, Monongahela, Youghiogheny and Conemaugh river valleys in Pennsylvania [...]
Entry/Object ID
2345
Tags
Clay
Book Details
Author
Thomas C. Hopkins
Series
Pennsylvania State College. Annual report ; 1897, appendix, Pennsylvania State College. Official document ; 21