Schlesinger Library, RIAS, Harvard University:
RombauerBeckerfamily_MC449_176_01
Schlesinger Library, RIAS, Harvard University:
RombauerBeckerfamily_MC449_176_02
Schlesinger Library, RIAS, Harvard University:
RombauerBeckerfamily_MC449_176_03
Schlesinger Library, RIAS, Harvard University:
RombauerBeckerfamily_MC449_176_04