N.C.I. grading guide :   a step-by-step approach to the grading of uncirculated and proof coins / 
Jaimes L. Halperin ; Numismatic Certification Institute. 
 - Dallas :    Ivy Press,  1986. 
 - 154 p. :  il. (some color) ;   25 cm. 
 - 737(73) (NLA) .
<br/><br/><label>ISBN: </label>0933372027  
<br/><br/><label>Universal Decimal Class. No.: </label>737(73) (NLA)