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 Stephen Coles
Photo(s) by “Steve” on Flickr.
Contributed by Nick Sherman
Contributed by Ian Lanius
Contributed by Indra Kupferschmid
Contributed by Florian Hardwig
Contributed by Chris Purcell