1. Heat in the earth;Allan;Advan. Sci.,1955
2. The loss of heat by conduction from the earth's crust in Britain;Anderson;Proc. Roy. Soc. Edinburgh,1940
3. The measurement of the flow of heat through the crust of the earth;Beck,1956
4. Terrestrial flow of heat near Flin Flon, Manitoba;Beck;Nature,1962
5. private communication;Beck,1963