Geology and beryl deposits of the peerless pegmatite Pennington county South Dakota /
by Douglas M. Sheridan...[et al.].
-- Washington : United States Government Printing Office, 1957
- 47 p. + 1 map. --
(Geological Survey Professional Paper ; 297-A).
Dakota del Sur
Geología
55(783)
Dakota del Sur
Geología
55(783)