Poke around here a bit and check if there is a free download of the service literature.
http://earlytelevision.org/postwar_t..._diagrams.html
If not check the Sam's photofact index.... Don't buy from Sam's unless it's a last resort....they will charge you $22 for a mediocre photocopy. Instead try to find a used original print....they are usually. 1/4 the price.