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Early market experience of solar energy in the United States
Hirshberg, A. S., (1981)
Evaluation the National Passive Promotion Program, Plans & progress
Heffernan, S., (1981)
Stand und Aussichten der Nutzung der Sonnenergie
Justi, Eduard, (1976)
Passive economics and market analysis model
Sedmak, M. R., (1981)