Jilar, T. (1985). Large-scale solar heating technology: Ingelstad, a solar group heating plant without heat pumps. Swedish Council for Building Research.
Dyfyniad Arddull ChicagoJilar, Torbjörn. Large-scale Solar Heating Technology: Ingelstad, a Solar Group Heating Plant Without Heat Pumps. Stockholm: Swedish Council for Building Research, 1985.
Dyfyniad MLAJilar, Torbjörn. Large-scale Solar Heating Technology: Ingelstad, a Solar Group Heating Plant Without Heat Pumps. Swedish Council for Building Research, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.