All that can presently (July 2019) be gleaned about Mabelle G. Doughty from sheet music covers and by internet searching is that she has 2 works published between 1907 and 1908.
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This list is arranged in chronological order and contains 2 works by Mabelle G. Doughty.
It does not claim to be complete and represents only the number of items located. Keys:ER