Volz, Wilhelm Theodor August Hermann <br/><br/>
The national structure of the population of Upper-Silesia in three maps / 
Wilhelm Volz. 
 - Breslau :  M. & H. Marcus,  1921. 
 - 11 s. :  map. :  28 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Ethnology -- Silesia, Upper (Poland) -- Maps.