Columbia subject headings:
B.H. Blackwell Ltd.--History.
Blackwell family.
Booksellers and bookselling--England--Oxford--History.
Publishers and publishing--England--Oxford--History.
Harvard subject headings:
B.H. Blackwell Ltd.--History.
Blackwell family.
Booksellers and bookselling--England--Oxford--History.
Oxford (England)--History.
Publishers and publishing--England--Oxford--History.
Princeton subject headings:
Blackwell family.
Blackwell, B.H., Ltd., booksellers, Oxford--History.
Booksellers and bookselling--England--Oxford--History.
Publishers and publishing--England--Oxford--History.