1. Civil Eng. Dep., 220 Cobleigh Hall; Montana State Univ.; Bozeman MT 59717
2. Biol. Syst. Eng. Dep.; Univ. of Nebraska; Lincoln NE 68583
3. South Central Res. and Ext. Cent.; Univ. of Nebraska; Box 66 Clay Center NE 68933
4. Agronomy Dep.; Univ. of Nebraska; Lincoln NE 68583
5. Biometry Dep.; Univ. of Nebraska; Lincoln NE 68583