Columbia subject headings:
Booksellers and bookselling--Colportage, subscription trade, etc.
Early printed books--18th century.
English imprints.
Harvard subject headings:
Booksellers and bookselling--Colportage, subscription trade, etc.
Early printed books--18th century--Bibliography.
Early printed books--18th century.
English imprints
Princeton subject headings:
Booksellers and bookselling--Colportage, subscription trade, etc.
Early printed books--18th century.
English imprints.