Dora Mayer De Zulen - Böcker

Conduct of the Cerro de Pasco Mining Company, by Dora Mayer, President of the Press Committee of the "Asociación Pro-indígena"

Conduct of the Cerro de Pasco Mining Company, by Dora Mayer, President of the Press Committee of the "Asociación Pro-indígena"

Objeto De La Legislacion

Estudio Sociologico