Columbia subject headings:
Antietam National Battlefield (Md.)
Barns--Conservation and restoration--Antietam National Battlefield (Md.)
Farm buildings--Research--Maryland.
Mumma Barn (Sharpsburg, Md.)
Harvard subject headings:
Antietam National Battlefield (Md.)
Barns--Conservation and restoration--Maryland--Antietam National Battlefield.
Farm buildings--Research--Maryland.
Samuel Mumma Farm Barn (Md.)
Princeton subject headings:
Antietam National Battlefield (Md.)
Barns--Maryland--Antietam National Battlefield--Design and construction.
Farm buildings--Conservation and restoration--Maryland--Antietam National Battlefield.
Historic buildings--Maryland--Antietam National Battlefield--Designs and plans.