Perry, Nance. <br/><br/>
Australian opals in colour / 
by Nance and Ron Perry. 
 - Sydney :  Reed,  c1969. 
 - 112 p. :  illus. (part col.), col. maps. ;  18 x 19 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Opals.<br/>Precious stones--Australia.
<br/><br/><label>Dewey Class. No.: </label>622.387  / PEA 1969