Disketten 


W a g n e r, Michael J/ /: Machine Language 
DiskI/O & other Mysteries. David MooreEd. 
Charles Trapp -Assistant Ed. D.J. 
Smith -Cover Design and Graphics. 1st ed. 
2nd prin~. /Illustr./ -Upland IJG 1984 
270 S. 4 
(TRS-80 Information Series. 5.)