All that can presently (August 2015) be gleaned about by internet searching is that Ed Gerhart is the one-off composer of Chromatic Rag (1916) published by Waterson, Berlin & Snyder Co., New York, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 1 work by Ed Gerhart. It does not claim to be complete and represents only the number of items located. Key: Electronic Resource Items