Columbia subject headings:
Beuys, Joseph--Exhibitions.
Murken, Axel Hinrich--Art collections--Exhibitions.
Murken, Axel Hinrich--Interviews.
Murken-Altrogge, Christa, 1944---Art collections--Exhibitions.
Harvard subject headings:
Beuys, Joseph--Exhibitions.
Murken, Axel Hinrich--Art collections--Exhibitions.
Murken, Axel Hinrich--Interviews.
Murken-Altrogge, Christa, 1944---Art collections--Exhibitions.
Princeton subject headings:
Beuys, Joseph--Exhibitions.
Interviews.
Murken, Axel Hinrich--Art collections--Exhibitions.
Murken, Axel Hinrich--Interviews.
Murken-Altrogge, Christa, 1944---Art collections--Exhibitions.