Yes! There was an exhibition of his work at the James Michener Museum in Doylestown, PA earlier this year. I was amused that there were pieces that at first look might scream "PHOTOSHOP" and then next to it is the title card "Silver gelatin print 1968."
They had a short video showing him in his darkroom with about 5 or 6 monster enlargers lined up so he could make setups and then create multiple prints as a sort of assembly line operation. In a lecture about him at the museum, someone commented that he was very generous in explaining his techniques to others -- then suggested that was because even after he told you, you still couldn't do it!