Naturopathic physicians are licensed in Alaska, Arizona, Connecticut, Hawaii, Montana, Oregon and Washington but practice in most states. Information about where to find a naturopathic physician nearest 
you may be obtained from the American Association of Naturopathic Physicians.
References:
The Multiple Sclerosis Diet Book - A Low Fat Diet for the 
Treatment of M.S. R. Swank, M. D., B. Dugan 1977 Doubleday New York
Materia Medica 
with Repertory O. Boericke M. D. 9th Ed., 1927 Boericke & Runyon Phila.
Gut Ecosystem 
Dynamics III - The Clinicians Guide to the D'Adamo Serotype Polymorphisms P. D'Adamo, N. D., 
Townsend Letter for Doctors Aug/Sept. 1990
The Homeopathic Emergency Guide - A Quick 
Reference Handbook to Effective Homeopathic Care T. Kruzel, N. D., North Atlantic Books Berkeley 
1992
Dietary Lectins - Food Allergies & Blood Type Specificity
  P. D'Adamo, N. D., 
Townsend Letter for Doctors June 1991
Lectures in Naturopathic Hydrotherapy W. Boyle N. 
D., & A. Saine, N.D., Buckeye Naturopathic Press East Palestine, Oh. 1988
The Principles 
and Practice of Medicine 21st Ed. Harvey, M. D., et al. Appleton-Century-Crofts, Norwalk, Ct. 
1984
The Merc Manual 14th Ed. MSD
The Web That Has No Weaver Ted 
Kaptchuk, O.M.D. Congdon & Weed New York 1983
Traditional Foods Are Your Best Medicines 
R. Schmid, N.D.
  Ocean View Publications Stratford 1987
Pottenger's Cats: A Study in 
Nutrition - Edited Writings of F. Pottenger, M. D., E. Pottenger & R. Pottenger, M. D., The Price-
Pottenger Foundation 1983
Nutrition and Physical Degeneration W. Price The Price-Pottenger 
Foundation LaMesa, Ca 1945