Columbia subject headings:
Harvard subject headings:
Book industries and trade--Canada--Directories.
Book industries and trade--United States--Directories
Books--Canada--Marketing--Handbooks, manuals, etc.
Books--United States--Marketing--Handbooks, manuals, etc.
Booksellers and bookselling--Canada--Directories.
Booksellers and bookselling--United States--Directories
Princeton subject headings:
Book industries and trade--Canada--Directories.
Book industries and trade--United States--Directories.
Books--Canada--Marketing--Handbooks, manuals, etc.
Books--United States--Marketing--Handbooks, manuals, etc.
Booksellers and bookselling--Canada--Directories.
Booksellers and bookselling--United States--Directories.
Directories.