There are 16 titles associated with this person.

Hays , M. (1793). Letters and essays, moral, and miscellaneous. by mary hays. London: Thomas Knott [Lombard Street]
Hays , M. (1796). Memoirs of emma courtney. by mary hays. in two volumes. ... London: George, George, and John Robinson.
Hays , M. (1798). Appeal to the men of great britain in behalf of women. London: Joseph Bell. Joseph Johnson.
Hays , M. (1798). Appeal to the men of great britain in behalf of women. London: Joseph Bell. Joseph Johnson.
Hays , M. (1806). Historical dialogues for young persons. London: Joseph Johnson. Joseph Mawman [Poultry]