if it is not in the spirit of a rather-too-tedious request for information, could one of you map out the corpus of donald barthelme for me?

If you go looking for issues, also check for the modified title:

It was initially called New American Review, published and distributed as a paperback book by the New American Library, and while it continued publication at Simon & Schuster, but shortened its name to American Review when it moved to Bantam Books in 1973.

Lots of good stuff!