This just in from Alexander Rannie:

[The Chouinard book (Chouinard: An Art Vision Betrayed) was published in 1986, not 1965. (I'm suspecting a typo.)

And be sure to check out the following site (if you don't already know about it):
http://www.chouinardfoundation.org/

The history page gives an outline of the Foundation's mission to perpetuate Nelbert Chouinard's work.]