Columbia subject headings:
Harvard subject headings:
Harlequin Enterprises--History.
Literature and society.
Plots (Drama, novel, etc.)
Popular literature--History and criticism.
Publishers and publishing--Ontario--Toronto.
Romance fiction
Romance fiction--History and criticism.
Romance fiction--Publishing--Canada.
Women in literature
Women--Books and reading.
Princeton subject headings:
Harlequin Enterprises.
Romance fiction--History and criticism.