Category:Volcanology in 1921

Media in category "Volcanology in 1921"

The following 2 files are in this category, out of 2 total.

• 
  ETH-BIB-Friedlaender-Popocatepetl, das Ranchito vor dem Observatorium in Tlamacas-Hs 1309-0037-045.tif 3,300 × 1,950; 18.45 MB
  
• 
  ETH-BIB-Friedlaender-Popocatepetl, Kraterrand-Hs 1309-0037-061.tif 3,422 × 2,073; 20.34 MB