Columbia subject headings:
Libraries--Special collections--Printed ephemera.
Printed ephemera--Collectors and collecting.
Printed ephemera--Conservation and restoration.
Vertical files (Libraries)
Harvard subject headings:
Libraries--Special collections--Printed ephemera
Printed ephemera--Collectors and collecting.
Printed ephemera--Conservation and restoration.
Vertical files (Libraries)
Princeton subject headings:
Libraries--Special collections--Printed ephemera.
Printed ephemera--Collectors and collecting.
Printed ephemera--Conservation and restoration.
Vertical files (Libraries)