Unity from diversity :  extracts from selected Pennsylvania colonial documents, 1681 to 1780, in commemoration of the tercentenary of the Commonwealth / 
compiled and edited by Louis M. Waddell. 
 - Harrisburg :  Commonwealth of Pennsylvania, Pennsylvania Historical and Museum Commission,  1980. 
 - iv, 89 p. :  ill. ;  23 cm. 
<br/><br/> Pa. State Docs. class. no. PY H673.2:U58d 
<br/><br/><label>ISBN: </label>0892710098 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Pennsylvania--History--Colonial period, ca. 1600-1775--Sources.<br/>Pennsylvania--History--Revolution, 1775-1783--Sources.