Columbia subject headings:
Book industries and trade--England--London--History--19th century--Directories.
Printers--England--London--Directories.
Printing industry--England--London--History--19th century--Directories.
Publishers and publishing--England--London--Directories.
Publishers and publishing--England--London--History--19th century--Directories.
Harvard subject headings:
Book industries and trade--England--London--History--19th century--Directories.
Printers--England--London--Directories.
Printing industry--England--London--History--19th century--Directories.
Publishers and publishing--England--London--Directories.
Publishers and publishing--England--London--History--19th century--Directories.
Princeton subject headings:
Printers--England--London--Directories.
Publishers and publishing--England--London--Directories.