Sources
Here you can find links to a number of digitised sources that were created by the “Verein”.
A complete set of the “Mittheilungen des Museen-Verbandes“ (the internal journal): https://digi.ub.uni-heidelberg.de/diglit/mitmusverb
A complete set of the “Verhandlungen” (the protocols of the yearly internal meetings): https://digi.ub.uni-heidelberg.de/diglit/verhversverbmb
The last list (1936) of the members of the “Verein”: https://doi.org/10.11588/diglit.43135#0001