1. Agricultural Physics/Engineering P.O. Box 772 Watkinsville GA 30677 USA
2. Dep. of Chemistry Southern Utah Univ. 315 W. Center St., SC 309 Cedar City UT 84720 USA
3. Dep. of Mathematics/Statistics Southern Utah Univ. 325 W. University Blvd. Cedar City UT 84720 USA
4. Animal Nutrition Smithfield Hog Production Division Rose Hill NC P.O. Box 759 28458 USA