Columbia subject headings:
Art, Puerto Rican--20th century--Private collections--Exhibitions.
Hills, Argentina S.--Art collections--Exhibitions.
Ramos, Angel--Art collections--Exhibitions.
Harvard subject headings:
Art, Puerto Rican--20th century--Private collections--Exhibitions.
Hills, Argentina S.--Art collections--Exhibitions.
Ramos, Ángel--Art collections--Exhibitions.
Princeton subject headings:
Art--Puerto Rico--Exhibitions.
Artists, Puerto Rican.
Hills, Argentina S.--Art collections--Exhibitions.
Ramos, Angel--Art collections--Exhibitions.