Pennington, H. C. <br/><br/>
TRS-80 disk and other mysteries 
by H.C. Pennington. 
 - Rev. ed. 
 - Upland, Calif.  IJG  1981, c1979. 
 - iii, [128] p. in various pagings  ill.  28 cm. 
 - TRS-80 information series  v. 1 .
<br/><br/><label>ISBN: </label>0936200006 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TRS-80 computers--Programming.