Columbia subject headings:
Harvard subject headings:
Drugs--Posters--Exhibitions.
Helfand, William H.
Helfand, William H.--Poster collections--Exhibitions.
Medicine and art--Exhibitions.
Medicine--Posters--Exhibitions.
Pharmacy in art--Exhibitions.
Philadelphia Museum of Art
Philadelphia Museum of Art--Exhibitions.
Posters--Pennsylvania--Philadelphia--Exhibitions.
Posters--Private collections--Pennsylvania--Philadelphia--Exhibitions.
Princeton subject headings:
Drugs--Posters--Exhibitions.
Helfand, William H.--Poster collections--Exhibitions.
Medicine--Posters--Exhibitions.
Philadelphia Museum of Art--Exhibitions.
Posters--Pennsylvania--Philadelphia--Exhibitions.
Posters.