Since primitive man first set fire to a heap of twigs to warm his cave, mankind has been making use of the earth's energy resources. Fortunately, we still have the sun, which offers us an inexhaustible source of non-polluting energy.
Reference:
Cawood, W. 1976. Introductory guide to solar energy. (BG). NBRI/CSIR. http://hdl.handle.net/10204/4698 .
Cawood, W. (1976). Introductory guide to solar energy (BG). NBRI/CSIR. Retrieved from http://hdl.handle.net/10204/4698
Cawood, WN Introductory guide to solar energy. BG. NBRI/CSIR, 1976. http://hdl.handle.net/10204/4698
Cawood W. Introductory guide to solar energy. 1976 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/4698
