1. Dep. of Biometry, 103 Miller Hall; Univ. of Nebraska; Lincoln NE 68583-0712
2. South Central Research and Extension Center; Box 66 Clay Center NE 68933
3. West Central Research and Extension Center; Route 4, Box 46A North Platte NE 69101
4. Pioneer Hi-Bred International; W. Des Moines IA 50265-5000