Stone, Ralph W.  1876-1964. <br/><br/>
Building stones of Pennsylvania / 
by Ralph W. Stone. 
 - Harrisburg, Pa. :  Dept. of Internal Affairs, Topographic and Geologic Survey,  1932. 
 - vii, 316 p. :  ill., 1 folded map ;    23 cm. 
 - Bulletin M ;  15 .
<br/><br/> At head of title: Pennsylvania Geological Survey, Fourth series. 
<br/><br/>Includes index. 
<br/><br/><label>LCCN: </label>gs 32000243  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Building stones--Pennsylvania.
<br/><br/><label>LC Class. No.: </label>TN951.P4  / S7