In the event you have never seen this, here is an interview conducted
by the Television Academy Foundation’s Archive of American Television
in 2001. There are eight sections, each roughly thirty minutes long,
yes...four hours. Of special interest to me is section four which
covers his first meeting Schulz through making of the Christmas
special.
http://www.emmytvlegends.org/interviews/people/bill-melendez
if you prefer, these are also on youtube