Alex Jay published an in-depth examination of the evolution of the Star Wars logo. See the full post on his blog Tenth Letter of the Alphabet.
Star Wars letterhead, with lettering by Joe Johnston
Mylar poster with Suzy Rice’s logo, 1977
“I’d been reading a book the night before the meeting with George Lucas, a book about German type design and the historical origins of some of the popular typefaces used today — how they developed into what we see and use in the present.”
— SUZY RICE
The New York Times, March 24, 1985
Full archive: Anatomy of a logo: Star Wars.