1) There are numerous galleries which are selling Bertha Lum’s prints.
I have NO commercial interest. Those links are here to help you to find the few prints wich are on the art market.
The list below is not exhaustive, but should nonetheless be quite complete. If you’ve got other adresses, I would be delighted to add them (but only if there are Bertha Lum’s prints)
The adresses with a “!!!” are currently selling prints.
2) Then come the auction houses which sell more or less regularly prints, books or paints by Bertha.
of course, but not only…