This issue is a variant of The Avengers (Marvel, 1963 series) #168 [Regular Edition].
Gyrich identified by Fred Snyder via the GCD Error Tracker.
Letters from Bill Mills, Scott Hermes, Dave Heeter
Featured in January 1978 and February 1978 Marvel comics. Sal Buscema credit per Nick Caputo, Feb 2011. Previous indexer listed John Buscema.