Here's a neat piece that Ken Quattro found in the National Archives - it's a recording of Joe Kubert and the EC Comics staff including Al Feldstein and William Gaines about who really invented 3-D comic books.
Quattro, Ken. 2012.
Tale of the Tape.
The Comics Detective blog (September 6): http://thecomicsdetective.blogspot.com/2012/09/tale-of-tape.html