References
- Byers, J. A. 1997. Surface distance between two points of latitude and longitude. Available ataccessed 11 May 2011 http://www.chemical-ecology.net/java/lat-long.htm (http://www.chemical-ecology.net/java/lat-long.htm)
- Irmak, S., and D. Z. Haman. 2003. Evapotranspiration: Potential or reference? IFAS Extension. Gainesville: University of Florida. Available ataccessed 11 May 2011 http://edis.ifas.ufl.edu/pdffiles/AE/AE25600.pdf (http://edis.ifas.ufl.edu/pdffiles/AE/AE25600.pdf)
- Oklahoma Mesonet. 2008. Overview. Available ataccessed 11 May 2011 http://www.mesonet.org/ (http://www.mesonet.org/)