Business Buyer's Guide, 1996 AT&T Toll-Free National Directory.
Company Profiles, Thomas Register, Volumes A-J, K-Z, 1995.
Idaho Business Directory, 1996-97, American Business Directories. ISBN
1-56105-852-1.
National Five-Digit Zip Code & Post Office Directory, U.S. Post Office,
1992.
Oregon Business Directory, 1996-97, American Business Directories. ISBN
1-56105-850-5.
Telephone Directories:
Washington Business Directory, 1996-97, American Business Directories. ISBN
1-56105-794-0.