R.J. Unstead Worthy, William <br/><br/>
Black's Children's Encyclopaedia 
/ by William Worthy 
 - 3rd ed. 
 - London :  Adam and Charles,  1967 
 - 384 p. 
<br/><br/><label>ISBN: </label>7136-1111-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Generalities
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Encyclopedia
<br/><br/><label>Dewey Class. No.: </label>032  / WOR-B3