A nice use of the alternate glyphs from ITC Serif Gothic, which were available at the time from ITC. The bulk of the letters in title on the cover use alternates: t, e, r, a.
See the alternates in this promotional from ITC, 1972.
Contributed by Nick Sherman
Photo(s) by “Buro Destruct” on Flickr.
Contributed by Stephen Coles
Contributed by Florian Hardwig
Contributed by Peiran Tan
Contributed by Love Lagerkvist
Contributed by Tereza Bettinardi
Contributed by Swiss Typefaces
Photo(s) by “Groove is in the Art” on Flickr.