,  <br/><br/>
The Statistical Abstract of the United States 19998 

 - Pennsylvania  Rudolf Walter Leonhardt  1950 
 - 1023 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label> 300 
<br/><br/><label>Dewey Class. No.: </label>P85  / St296