1. USDA-ARS; Northern Plains Area; 40335 Rd. GG Akron CO 80720
2. USDA-ARS; Environmental Quality Lab., BARC; Beltsville MD 20705
3. Environmental Microbial Safety Laboratory; Bldg. 173, Rm 204, BARC-East, 10300 Baltimore Ave. Beltsville MD 20705
4. Animal Manure and By-Products Lab.; ANRI, USDA; Bldg. 306, Rm. 109, BARC-East Beltsville MD 20705