1) James Edward Duffy (b. 1923) (ps. Pieter Van Raven) wrote The Doll's Hospital, The Christmas Gang, and Portugal in Africa and a number of other books.
2) Duffy, James, 1955- wrote The Fight for Rome.
3) James Duffy (b. 1934) wrote Dog Bites Man: City Shocked.
4) James E. Duffy wrote Auto Fuel Systems.
5) This actually the publisher not the author and is listed as both J. Duffey and James Duffy by WorldCat.