All that can presently (September 2019) be gleaned about Berte C. Randall from sheet music covers and by internet searching is that she has 2 works published between 1910 and 1911.
Of ragtime interest is That Aeroplane Rag
(1911) published by Jerome H. Remick & Co.
, New York & Detroit, USA.
Surfers are welcome to contribute information about this composer.