According to the Sams index it should be folder 502-1.
It's downloadable from Sams for $15.00 but you may be able to get an original copy cheaper from John Kendall at Vintage Electronics
http://www.vintage-electronics.com/ $8 shipped if he has one in stock, ask before ordering to make sure.
The set may look different but the Sams may cover several different models with the same basic chassis.