1. Crown-depth soil temperatures and winter protection for winter wheat survival;Aase;Soil Sci. Soc. Am. J.,1979
2. Ground temperature observations Big Delta, Alaska;Aitken;CRREL Tech. Rep. 104,1964
3. Ground temperature observations Barrow Alaska;Aitken;CRREL Tech. Rep. 105,1965
4. Snow cover and winter soil temperatures at St. Paul, Minnesota;Baker;Univ. Minn. Water Resour. Res. Center Bull. 37,1971
5. Baker, D.G., 1992. Personal communication. Department of Soil Science, Univ. Minn., St. Paul, MN.