1-6, February 21. 1960. synonymy, variation, and distribution of Ptychohyla leonhardschultzei Ahl.
"A Review of the Middle American Tree Frogs of the Genus Ptychohyla"
William E. Duellman
I venture to believe it will be a barrier against the Babel of confusion which tends to overwhelm the domain of zoological synonymy.
"Louis Agassiz: His Life and Correspondence"
Louis Agassiz
Since there would not be the same uncertainty, if what were in these cases substituted for that, it is evident that the terms are not "exactly synonymous;" but, even if they were so, exact synonymy would not evince a sameness of construction.
"The Grammar of English Grammars"
Goold Brown