A number of early issues of the historic print zine Radical Software are available online. Looks like they’ve been on the web for a few years, but it’s new to me. Snip from background:
[The publication] was started by Beryl Korot, Phyllis Gershuny, and Ira Schneider and first appeared in Spring of 1970, soon after low-cost portable video equipment became available to artists and other potential videomakers. Though scholarly works on video art history often refer to Radical Software, there are few places where scholars can review its contents. Individual copies are rare, and few complete collections exist.