Columbia subject headings:
Harvard subject headings:
Atoms--Databases--Congresses.
Atoms--Research--Congresses.
Collisions (Physics)--Research--Congresses.
Molecules--Databases--Congresses.
Molecules--Research--Congresses.
Nuclear spectroscopy--Research--Congresses.
Princeton subject headings:
Atoms--Databases--Congresses.
Atoms--Research--Congresses.
Molecules--Research--Congresses.