All that can presently (May 2013) be gleaned about by internet searching is that L. Maude Kleffman is the one-off composer of Atlantic City Rag (1913).
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by L. Maude Kleffman.
It does not claim to be complete and represents only the number of items located.