Aromascan PLC: Electra House, Electra Way, Crewe, Cheshire, CW1 1WZ, U.K. (U.K.) +44-270-216444 (U.K.) +44-270-216030 14 Clinton Dr., Hollis, NH 03049 (U.S.) 603-598-2922 (U.S.) 603-595-9916

Asoma Instruments: 11675 Jollyville Rd., Austin, TX 78759, 512-258-6608, 512-331-9123
Bran+Luebbe, Inc.: 1025 Busch Parkway, Buffalo Grove, IL 60089, 847-419-3149, 847-520-0855

Certified Analytical Group, Inc.: 200 Express St., Plainview, NY 11803, 516-576-1400, 516-576-1410
Elisa Technologies, Inc.: One Progress Blvd., Alachua, FL 32615, 904-462-4546, 904-462-3453

ESA, Inc.: 22 Alpha Rd., Chelmsford, MA 01824, 508-250-7000, 508-250-7090

ESHA Research: Ste. 200, 4263 Commercial St. SE, Salem, OR 97302, 503-585-6242, 503-585-5543

Express Analytic: 3131 Woodcreek Dr., Downers Grove, IL 60515, 800-926-8385, 708-512-1125

The Industrial Laboratories Co.: 1450 E. 62nd Ave., Denver, CO 80216, 303-287-9691 or 800-456-5288,  303-287-0964
Irvine Analytical Laboratories, Inc.: 10 Vanderbilt, Irvine, CA 92718, 714-951-4425, 714-951-4909

Arthur D. Little, Inc.: Acorn Park, Cambridge, MA 02140, 617-498-5147, 617-498-7288

Loryma GMBH: Am Falltor 7, D-64673 Zwingenberg, Germany, 0049-6251-71071, 0049-6251-73964

Michelson Laboratories Inc.: 6280 Chalet Dr., Los Angeles, CA 90046, 310-928-0553, 310-927-6625

Neotronics Scientific Ltd.: 4331 Thurmond Tanner Rd., Flowery Branch, GA 30542, 770-967-2196, 770-967-1854

R-Tech: P.O. Box 116, Minneapolis, MN 55440-0116, 800-328-9687, 612-486-0837

Ralston Analytical Laboratories: Checkerboard Square, 2RS, St. Louis, MO 63164, 314-982-1310, 314-982-1078

Silliker Laboratories Group: 900 Maple Rd., Homewood, IL 60430, 708-957-7878, 708-957-8449
USDA, Agri. Mktg. Service, Science Div.

Warren Analytical Laboratory: P.O. Box 650 "O" St., Greeley, CO 80632, 800-945-6669, 303-351-6648