As mentioned, I believe all sources will say that Hidy collaborated with Leisenring on the '41 version and he (Hidy) put the term "flymph" in the update to that book in '71.
As mentioned, I believe all sources will say that Hidy collaborated with Leisenring on the '41 version and he (Hidy) put the term "flymph" in the update to that book in '71.