Columbia subject headings:
Bridges--Abutments--Inspection.
Bridges--Abutments--Maintenance and repair.
Bridges--Foundations and piers--Inspection.
Bridges--Foundations and piers--Maintenance and repair.
Harvard subject headings:
Princeton subject headings:
Bridges--Abutments--Inspection.
Bridges--Abutments--Maintenance and repair.
Bridges--Foundations and piers--Inspection.
Bridges--Foundations and piers--Maintenance and repair.