GIS-based Indicators of Montana Grasshopper Communities. - Kerri M. Skinner; William P. Kemp; John P. Wilson (Trans. GIS, 2000)

Field-scale Variations in Plant and Grasshopper Communities: A GIS-based Assessment. - William P. Kemp; Kevin M. O'Neill; Maria Marta Cigliano; Sandra Torrusio (Trans. GIS, 2002)