1
Renewable energy engineering and technology : principles and practice /
Book
...EHA - Renewable energy sources...
Table of Contents 
2
Heat mining : A new source of energy /
Book
...EHA - Renewable energy sources...
3
Geothermal energy : The international success story : Geothermal resources council : annual meeting. 1981 : Houston, TX, 25.10.1981-29.10.1981.
Book