National Academy of Sciences,
Stability of an underground room in frozen gravel
Permafrost : North American contribution [to the] Second International Conference.
Pettibone, Howard C.
United States. Bureau of Mines.
International Conference on Permafrost (2nd : 1973 : I͡Akutsk, Russia) Permafrost : North American contribution [to the] Second International Conference.
Howard C. Pettibone.
Stability of an underground room in frozen gravel