Walford's guide to reference material 
edited by A.J. Walford with the assistance of Anthony P. Harvey and H. Drubba 
 - 4th ed 
 - Ottawa  Canadian Library Association  1980 
 - v. 25cm 
<br/><br/> Vol.1: 4th ed ; vol.2 & vol.3: 3rd ed 
<br/><br/>Contents: Vol.1: 4th ed. - v.2: 3rd & 4th ed. - v.3: 3rd ed. 
<br/><br/><label>ISBN: </label>0853656118  v.1 0853650888  v.2 0853654093  v.3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference books--Bibliography