The Alternate Source Programmer's Journal
The Alternate Source, also known as The Alternate Source Programmer's Journal, was a magazine of technical programming articles, most of which were at the assembly language level, focused on the TRS-80 Model I and Model III. A few articles related to the TRS-80 Color Computer. It was published by Charlie W. Butler (d.
Source: Wikipedia — The Alternate Source Programmer's Journal (CC BY-SA 4.0)