1. Dept. of Family and Consumer Sciences New Mexico State Univ. P. O. Box 30001 Las Cruces NM 88003‐8001 U.S.A.
2. New Mexico State Univ. P. O. Box 30001 Las Cruces NM 88003‐8001 U.S.A.
3. Industrial Engineering New Mexico State Univ. P. O. Box 30001 Las Cruces NM 88003‐8001 U.S.A.