Columbia subject headings:
Engel, Robert, 1902-1983--Art collections--Exhibitions.
Etching, Dutch--17th century--Exhibitions.
Etching, Dutch--Exhibitions.
Rembrandt Harmenszoon van Rijn, 1606-1669--Exhibitions.
Rembrandt Harmenszoon van Rijn, 1606-1669--Influence--Exhibitions.
Harvard subject headings:
Engel, Robert, 1902-
Engel, Robert, 1902-1983--Art collections--Exhibitions.
Etching, Dutch--17th century--Exhibitions.
Etching, Dutch--Exhibitions.
Etching--17th century--Netherlands--Exhibitions.
Rembrandt Harmenszoon van Rijn, 1606-1669--Exhibitions.
Rembrandt Harmenszoon van Rijn, 1606-1669--Influence--Exhibitions.
Princeton subject headings:
Engel, Robert--Art collections.
Etching, Dutch--Exhibitions.
Rembrandt Harmenszoon van Rijn, 1606-1669--Exhibitions.
Rembrandt Harmenszoon van Rijn, 1606-1669--Influence.