Ashley, Ruth. <br/><br/>
PC DOS :  a self-teaching guide / 
Ruth Ashley, Judi N. Fernandez. 
 - 2nd ed. 
 - New York :  Wiley,  c1985. 
 - ix, 246 p. :  ill. 
 - The Wiley IBM PC series .
<br/><br/><label>ISBN: </label>0471824712 (pbk) :  $16.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IBM Personal Computer--Programming.<br/>PC DOS (Computer operating system)
<br/><br/><label>LC Class. No.: </label>QA76.8.I2594  / A83 1985 
<br/><br/><label>Dewey Class. No.: </label>001.64�19