1. Yield measurements on combine harvesters;Auernhammer;ASAE Paper 93-1506,1993
2. Crop yield mapping using GPS;Birrell;ASAE Paper MC93-104,1993
3. Yield variability within fields in central Iowa;Colvin,1991
4. Global positioning system applications for site-specific farming research;Harrison;ASAE Paper 92-3615,1992