1. Agricultural and Biosystems Engineering South Dakota State Univ. Brookings SD 57007 USA
2. Biosystems and Agricultural Engineering Oklahoma State Univ. Stillwater OK 74078 USA
3. Civil Engineering and Environmental Science Univ. of Oklahoma Norman OK 73019 USA
4. Integrative Biology Oklahoma State Univ. Stillwater OK 74078 USA
5. Horticulture and Landscape Architecture Oklahoma State Univ. Stillwater OK 74078 USA