Columbia subject headings:
Harvard subject headings:
Buildings--Periodicals.
Contractors' operations--Periodicals.
Engineering--Periodicals
Roads--Periodicals
Water-supply engineering--Periodicals
Princeton subject headings:
Buildings--Periodicals.
Contractors' operations--Periodicals.
Engineering--Periodicals.
Periodicals.
Roads--Periodicals.
Water-supply engineering--Periodicals.