Columbia subject headings:
Bridges--Inspection--Congresses.
Engineering inspection--Congresses.
Nondestructive testing--Congresses.
Optical fiber detectors--Congresses.
Harvard subject headings:
Princeton subject headings:
Bridges--Inspection--Congresses.
Engineering inspection--Congresses.
Nondestructive testing--Congresses.
Optical fiber detectors--Congresses.