1
Heat mining : A new source of energy /
Book
Other Personal Name(s): ...Armstead, H. Christopher H....
2
Geothermal energy : its past, present and future contributions to the energy needs of man /
Book
Other Personal Name(s): ...Armstead, H. Christopher H....
3
Geothermal energy : its past, present and future contributions to the energy needs of man /
Book
Other Personal Name(s): ...Armstead, H. Christopher H....
4
Geothermal energy : Review of research and development /
Book
Other Personal Name(s): ...Armstead, H. Christopher H....