Hallgren, Richard C.
Interface projects for the TRS-80 / Richard C. Hallgren. - Englewood Cliffs, N.J. : Prentice-Hall, 1982. - 152 p. : ill. - A Spectrum book. .
TRS-80 Computers.
TRS-80 Model 1 (Computer).
Computer interfaces--Amateurs' manuals.
Interface projects for the TRS-80 / Richard C. Hallgren. - Englewood Cliffs, N.J. : Prentice-Hall, 1982. - 152 p. : ill. - A Spectrum book. .
TRS-80 Computers.
TRS-80 Model 1 (Computer).
Computer interfaces--Amateurs' manuals.