. . . . . . . "Energy conservation in buildings : techniques for economical design"@en . "Energy conservation in buildings : techniques for economical design" . . . "Energy conservation in buildings : techniques for economic design"@en . . . . "Energy conservation in buildings techniques for economical design"@en . . "Energy conservation in buildings: techniques for economical design"@en . . . "Energy conservation in building, techniques for economical design" . . . . . . . . "Arquitectura y economías de energía." . . "Architecture et économies d'énergie." . . "Architecture and energy conservation." . .