John M. Duffy (disambiguation)
"John M. Duffy" is composed of at least 2 distinct authors, divided by their works.
About the Author
Author Division
John M. Duffy (unknown)
Common Knowledge
- Disambiguation notice
- #1 Duffy, John Michael, 1943- The Synodicon Vetus
#2 Duffy, John, 1955- Writing from these roots