There are 6 titles associated with this person.

Betham, Mary M. A Biographical Dictionary of the Celebrated Women of every Age and Country. By Matilda Betham. London: Benjamin Crosby and Co., Thomas Tegg and Castleman, Edmund Lloyd [24 Harley Street], 1804.
Betham, Mary M. Poems by Matilda Betham. London: John Hatchard [190 Piccadilly], 1808.
Taylor, Ann, M., John Aikin, Amelia Opie, Joanna Baillie, Elizabeth S. Rowe, Laura S. Temple, Mary M. Betham, Laetitia Pilkington, Mary W. Montagu, Anna Sewell, Catherine Phillips, and Anna L. Barbauld. Vocal Poetry, a select collection of English songs. To which is prefixed an essay on song-writing, by John Aikin, M.D. London: Joseph Johnson and Co., 1810.
Betham, Mary M. The Lay of Marie. A Poem. By Matilda Betham. London: Rowland Hunter, 1816.
Betham, Mary M. Vignettes: in Verse. By Matilda Betham. London: Rowland Hunter, 1818.