|
1
|
|
Geological surveys -- United States. / https://id.loc.gov/authorities/subjects/sh85054081 : National Research Council (U.S.).
|
1932
|
1
|
|
2
|
|
Geological surveys -- United States -- History -- 19th century. / https://id.loc.gov/authorities/subjects/sh85054081 https://id.loc.gov/authorities/subjects/sh2002006167 : Warren, Leonard,
|
2009
|
1
|
