FOUND! Or rather (and even better), SENT to me! Jo Baer's October 1983 Art in America essay, I Am No Longer An Abstract Artist -
CliCK HeRe to see it BIG enough to Read.
ClicK HERE to Read.
I hadn't realized this is part of a larger feature on thirteen abstract painters of the sixties... I'm going to do more research.
RELATED: Jo Baer's letter to Artforum, September 1967