AC Humko: P.O. Box 343, Memphis, TN 38101, 800-344-8656, 901-766-7855

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

CEM Corp.: P.O. Box 200, Matthews, NC 28106-0200, 704-821-7015, 704-821-7894

Certified Analytical Group, Inc.: 200 Express St., Plainview, NY 11803, 516-576-1400, 516-576-1410

Cornell Institute of Food Science: 114 Stocking Hall, Ithaca, NY 14853, 607-255-7915, 607-254-4868

DFL Laboratories: 1548 Cummins Dr., Modesto, CA 95358-6412, 209-521-5503, 209-521-1005

Elisa Technologies, Inc.: One Progress Blvd., Alachua, FL 32615, 904-462-4546, 904-462-3453

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

Industrial Laboratories of Canada, Inc.: 95 Townline Rd., Tillsonburg, Ontario, N4G 4H3 Canada, 800-668-1958, 519-688-0644

Lancaster Lab, Inc.: 2425 New Holland Pike, P.O. Box 12425, Lancaster, PA 17605-2425, 717-656-2300, 717-656-2681

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

Medallion Laboratories: 9000 Plymouth Ave., Minneapolis, MN 55427, 800-245-5615, 612-540-4010

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

Pert Laboratories: 145 Peanut Dr., P.O.Box 267, Edenton, NC 27932, 919-482-4456, 919-482-5370

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

Science and Technology Div., Agricultural Marketing Service, USDA: P.O.Box 96456, Room 3517, 14th & Independence Ave. SW, Washington, DC 20090-6456, 202-690-4025, 202-720-6496

Silliker Laboratories Group: 900 Maple Rd., Homewood, IL 60430, 708-957-7878, 708-957-8449

Thermedics Detection: 220 Mill Rd., Chelmsford, MA 10824, 508-251-2100, 508-256-0999

TPC Labs: 330 University Ave. S.E., Minneapolis, MN 55414, 800-400-2390, 612-330-8266

USDA, Agri. Mktg. Service, Science Div.
Warren Analytical Laboratory: P.O. Box 650 "O" St., Greeley, CO 80632, 800-945-6669, 303-351-6648

Woodson-Tenent Laboratories, Inc.: 1331 Union Ave., Ste. 1500, Memphis, TN 38104, 901-521-4500, 901-521-4510