Watson, Alan <br/><br/>
Sources of law, legal change, and ambiguity / 
Alan Watson. 
 - Philadelphia :  University of Pennsylvania Press,  1998. 
 - xviii, 168 pages ;  22 cm. 
<br/><br/>Includes bibliographical references (pages [133]-157) and index. 
<br/><br/><label>ISBN: </label>0812216393   paperback 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Law--Sources<br/>Law reform<br/>Law--History
<br/><br/><label>Dewey Class. No.: </label>340