Commodore 64 Programmer’s Reference Guide First Ed 1st Print 1982

Commodore 64 Subroutine Cookbook by David Busch Vintage 1984 Brady 1st Printing

Commodore 64 Subroutine Cookbook by David D. Busch 1st Ed 1984 Paperback Scarce

Commodore 64 Programmer's Reference Guide

Commodore 64 Programmer's reference guide

Commodore 64 Programmer's Reference Guide

COMMODORE VIC 20 Programmer's Reference Guide 1st Ed 1982 Complete w/ Schematic