ISBN, international standard book numbering :  (incorporating the guidelines for numbering software intended for sale by retailers) / 
[Standard Book Numbering Agency]. 
 - 6th (revised) ed. 
 - London :  The Agency,  1985. 
 - 28 p. 
<br/><br/><label>ISBN: </label>0949999040 :   1.00 
<br/><br/><label>Nat. Bib. No.: </label>GB78-36553 
<br/><br/><label>Subjects--Corporate Names: </label><br/>International Standard Book Numbers.
<br/><br/><label>LC Class. No.: </label>Z278  / .S8 1978 
<br/><br/><label>Dewey Class. No.: </label>070.5/73