All that can presently (January 2016) be gleaned about by internet searching is that Bertha E. Roberts is the one-off composer of The California Girl March (?) published by The Sunday Examiner, , USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by Bertha E. Roberts.
It does not claim to be complete and represents only the number of items located. Keys:ER