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., Tegg and Castleman, Edmund Lloyd [24 Harley Street], 1804.
Betham, Mary M. Poems by Matilda Betham. London: John Hatchard [190 Piccadilly], 1808.
Baillie, Joanna, Anna L. Barbauld, Catherine Phillips, Anna Sewell, Amelia Opie, Mary M. Betham, Ann M. Taylor, Mary W. Montagu, Elizabeth S. Rowe, Laetitia Pilkington, John Aikin, and Laura S. Temple. Vocal Poetry, a select collection of English songs. To which is prefixed and 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.