Long-term use of frost tubes to monitor the annual freeze-thaw cycle in the active layer
Viereck LA and Lev DJ. 1983. Long-term use of frost tubes to monitor the annual freeze-thaw cycle in the active layer. Pages 1309-1314. In Author unknown: Permafrost Fourth International Conference Proceedings. University of Alaska. July 17-22, 1983. National Academy Press. Washington, DC