Columbia subject headings:
Boulez, Pierre, 1925-2016--Correspondence.
Conductors (Music)--Switzerland--Correspondence.
Sacher, Paul--Correspondence.
Saint-Phalle, Niki de, 1930-2002--Correspondence.
Sculptors--Switzerland--Correspondence.
Tinguely, Jean, 1925-1991--Correspondence.
Tinguely, Jean, 1925-1991.
Harvard subject headings:
Boulez, Pierre, 1925-2016--Correspondence.
Conductors (Music)--Switzerland--Correspondence.
Letter writing in art.
Sacher, Paul--Correspondence.
Saint-Phalle, Niki de, 1930-2002--Correspondence.
Sculptors--Switzerland--Correspondence.
Tinguely, Jean, 1925-1991--Correspondence.
Tinguely, Jean, 1925-1991.
Princeton subject headings:
Artists and patrons--Correspondence.
Letter writing in art.
Sacher, Paul--Correspondence.
Sculptors--Switzerland--Correspondence.
Tinguely, Jean, 1925-1991--Correspondence.