Groff, Clyde L. <br/><br/>
The Groff Book 

 - Ronks, PA  Groff History Associates  1985 
<br/><br/><label>Subjects--Personal Names: </label><br/>Groff Family
<br/><br/><label>Subjects--Topical Terms: </label><br/>Families
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Pennsylvania