Columbia subject headings:
Space environment--Congresses.
Space vehicles--Contamination--Congresses.
Space vehicles--Optical equipment--Congresses.
Harvard subject headings:
Space environment--Congresses.
Space vehicles--Contamination--Congresses.
Space vehicles--Optical equipment--Congresses
Princeton subject headings:
Space environment--Congresses.
Space vehicles--Contamination--Congresses.
Space vehicles--Optical equipment--Congresses.