Columbia subject headings:
Blackwood, John, 1818-1879.
Blackwood, William, 1776-1834.
William Blackwood and Sons.
Harvard subject headings:
Blackwood, John, 1818-1879.
Blackwood, William and Sons, Firm, Publishers.
Blackwood, William, 1776-1834.
English literature--History and criticism
Great Britain--Intellectual life.
Princeton subject headings: