Just a follow-on to my recent mention of SPARC. Knowing that I had worked with SPARC intermittently through the 70s and 80s, I made a quick search of the 10,846 negatives so far (as of yesterday) uncovered for the 1974-1999 period to look for likely relevant keyword matches. Less than half of those have any keywords at all, but I did locate a few SPARC-related items after a few minutes to supplement that previous post.
Here, we see some images of a couple of artists I worked closely with, a few research photos of potential public art sites on freeway walls (an ongoing quest was to find and negotiate for public art spaces around LA), and other miscellany. I probably have some more stuff from the SPARC period on my photoblog (that may not be of general interest, however).