Harl Vincent
![Harl Vincent, as pictured in the September 1929 issue of ''[[Air Wonder Stories]]''](https://upload.wikimedia.org/wikipedia/commons/1/15/Harl_vincent_-_aws.jpg)
Harl Vincent (October 19, 1893 – May 5, 1968) was the pen name of Harold Vincent Schoepflin, an American mechanical engineer and science fiction author. He was published regularly in science fiction pulp magazines.
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