1
2
Έκδοση: 1994
Superior document: A history of the Water Resources Branch, U. S. Geological Survey 1
3
Έκδοση: 1929-1971
4
Άλλοι συγγραφείς:
“...United States Geological Survey...”
5
Έκδοση: April,, 1953
6
Άλλοι συγγραφείς:
“...United States Geological Survey...”
7
Άλλοι συγγραφείς:
“...United States Geological Survey...”
8
Έκδοση: 1932-1993
9
Έκδοση: 1887-1973
10
11
Έκδοση: 2007
Superior document: U. S. Geological Survey professional paper 1703
12
Έκδοση: 1989
13
Έκδοση: 1883-1934
14
Έκδοση: 1900
15
Έκδοση: 1990
Superior document: A history of the Water Resources Division, US Geological Survey 5
16
“...United States Geological Survey...”
17
“...United States Geological Survey...”
18
“...United States Geological Survey...”
19
“...United States Geological Survey...”
20
“...United States Geological Survey...”