Spooner, Maggie.
Sunpower experiments : solar energy explained / by Maggie Spooner. - Rev. ed. - New York : Sterling, 1981. - 72 p. : ill. (some col.).
0806931108
Solar energy.
Sunpower experiments : solar energy explained / by Maggie Spooner. - Rev. ed. - New York : Sterling, 1981. - 72 p. : ill. (some col.).
0806931108
Solar energy.