Years ago in graduate school I took a class from a fellow who had studied with Fred. It wasn't a photography class, but a few of us ended up working with this guy for the next two years.
The second time we met as a class he showed us some of his work and we sat there in shock and said, can you teach us how to print like that?
He of course taught us the methods that he learned from Fred Picker and it turned my world around; learning how to control my tools and technique.
He was of course a salesman, but he made some great modification to equipment and had some wonderful tips and points about making better prints.
I have the whole set of his news letters, still sitting on the shelve at school in case my students what to take a look.