Beil, Donald H. <br/><br/>
The Dif file :  for users of VisiCalc and other software / 
Donald H. Beil 
 - Reston, Va. :  Reston Pub. Co.,  1983 
 - 235 p. ;  28 cm. 
<br/><br/>Bibliography : p. 213-224 
<br/><br/><label>ISBN: </label>0835913058 
<br/><br/><label>LCCN: </label>83-000455 
<br/><br/><label>Subjects--Topical Terms: </label><br/>File organization (Computer science)<br/>Data structures (Computer science)