1. American Medical Association (AMA). (1981). AMA Physician Masterfile.
2. American Medical Association (AMA). (1986). AMA Physician Masterfile.
3. American Medical Association (AMA). (1991). AMA Physician Masterfile.
4. American Medical Association (AMA). (1996). AMA Physician Masterfile.
5. The need of community health centers for international medical graduates;Baer;American Journal of Public Health,1999