[DKing]

Call the Library of Congress. If you have written an original work, be it fiction, nonfiction, or technical, and have a printed copy of this work, you own the work and all the rights associated with that original work. It doesn't even need to have the copyright "C" on it.

That being said, he're Shelby's written work from 1965, in "The Cobra Story":

"When the first car arived in Santa Fe Springs, although it bore the designation CSX0001 (Carroll Shelby Experimental) we already had a name for it. While the machine was on its way from England a strange thing happened. One night I had a dream in which I saw the name "Cobra" on the front of the new car. I woke up and jotted the name down on a pad wich I kept by my bedside---a sort of ideas pad---and went back to sleep. Next morning when i looked at teh name "Cobra," I knew it was right. This had to be it. But when I decided to call my car the Cobra, we ran into an unexpected problem while getting the paperwork ready to apply for a copyright. It suddenly tuned up that years before Crosley had built an engine which they had called a "Cobra," though for very different reasons.