Columbia subject headings:
Field, George B., 1929-
Galaxies--Magnetic fields--Congresses.
Interstellar matter--Congresses.
Harvard subject headings:
Field, George B., 1929-
Galaxies--Magnetic fields--Congresses.
Interstellar matter--Congresses.
Princeton subject headings:
Galaxies--Magnetic fields--Congresses.
Interstellar matter--Congresses.