Columbia subject headings:
Architecture and energy conservation--Europe, German-speaking--Designs and plans.
Architecture, Domestic--Europe, German-speaking--Designs and plans.
Housing, Single family--Europe, German-speaking--Designs and plans.
Harvard subject headings:
Architecture and energy conservation--Europe, German-speaking--Designs and plans.
Architecture, Domestic--Europe, German-speaking--Designs and plans.
Housing, Single family--Europe, German-speaking--Designs and plans.
Princeton subject headings:
Architecture, Domestic--Europe, German-speaking--History--21st century--Designs and plans.
Dwellings--Energy conservation--Europe, German-speaking--History--21st century--Designs and plans.