Columbia subject headings:
Bertoia, Harry--Catalogues raisonnés.
Monotype (Engraving), American--Catalogs.
Monotype (Engraving)--United States--20th century--Catalogs.
Harvard subject headings:
Bertoia, Harry--Catalogues raisonnés.
Monotype (Engraving), American--Catalogs.
Monotype (Engraving)--20th century--United States--Catalogs.
Princeton subject headings:
Bertoia, Harry--Catalogues raisonnés.
Monotype (Engraving), American--Catalogs.
Monotype (Engraving)--20th century--United States--Catalogs.