#1 JWM, author of The Golden Age of French Cinema, is John Wiley Martin, b.1937.
#2 John W. Martin - Seminole County, Florida
#3 Martin, John W. (John Walter) 1952- Sage Sparrow
The book about Seminole County may be by John Wellborn Martin (see Wikipedia above). It was published by the Seminole County Board of Commissioners in 1926: JWM was Governor of Florida at the time.