Eckel, Edwin Butt 1906-1989
Geology and mineral resources of Paraguay a reconnaissance / by Edwin B. Eckel. -- Washington : United States Government Printing Office, 1959 - 110 p. + [2] h. de map. -- (Geological Survey Professional Paper ; 327).
Geología
Paraguay
55(892)
Geology and mineral resources of Paraguay a reconnaissance / by Edwin B. Eckel. -- Washington : United States Government Printing Office, 1959 - 110 p. + [2] h. de map. -- (Geological Survey Professional Paper ; 327).
Geología
Paraguay
55(892)