Piers Anthony (w/R. Margroff):
Science Fiction Technology and Ideas
Robert Ervien Margroff (b. 193 0- d. 2015) was an American writer who published his first story, "Monster Tracks", in If in 1964 solo, but became best known for the collaborations with Piers Anthony which comprise all his book-length work.
Invention/Technology Source Work (Publication Date)

Gyrocar (Gyro)

The Ring (1969)

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