District of Columbia (State / Territory) (Geographic Keyword)
5,851-5,875 (8,256 Records)
Black and white photograph of test unit 33.
Photograph, Negative of Test Unit 34, 2000.031_0170 (1994)
Black and white photograph of test unit 34.
Photograph, Negative of Test Unit 34, 2000.031_0174 (1994)
Black and white photograph of test unit 34.
Photograph, Negative of Test Unit 35, 2000.031_0176 (1994)
Black and white photograph of test unit 35.
Photograph, Negative of Test Unit 35, 2000.031_0180 (1994)
Black and white photograph of test unit 35.
Photograph, Negative of Test Unit 36, 2000.031_0182 (1994)
Black and white photograph of test unit 36.
Photograph, Negative of Test Unit 36, 2000.031_0187 (1994)
Black and white photograph of test unit 36.
Photograph, Negative of Test Unit 37, 2000.031_0191 (1994)
Black and white photograph of test unit 37.
Photograph, Negative of Test Unit 37, 2000.031_0194 (1994)
Black and white photograph of test unit 37.
Photograph, Negative of Test Unit 40, 2000.031_0120 (1994)
Black and white photograph of test unit 40.
Photograph, Negative of Test Unit 41, 2000.031_0107 (1994)
Black and white photograph of test unit 41.
Photograph, Negative of Test Unit 42, 2000.031_0118 (1994)
Black and white photograph of test unit 42.
Photograph, Negative of Test Unit 43, 2000.031_0136 (1994)
Black and white photograph of test unit 43.
Photograph, Negative of Test Unit, 2000.031_0077 (1994)
Black and white photograph of test unit.
Photograph, Negative of Test Unit, 2000.031_0090 (1994)
Black and white photograph of a test unit.
Photograph, Negative of Tree, 2000.027_0105, N.D. (2018)
Black and white photograph of fallen tree.
Photograph, Negative of Tree, 2000.027_0141, N.D. (2018)
A black and white photograph of a tree surrounded by some foliage.
Photograph, Negative of Trees in a Wooded Area, 2000.031_0007 (1994)
Black and white photograph of a wooded area.
Photograph, Negative of Trees, 2000.027_0106, N.D. (2018)
Black and white photograph of trees and field to the right.
Photograph, Negative of Trees, 2000.027_0109, N.D. (2018)
Black and white photograph of trees and field to the right.
Photograph, Negative of Trench, 2000.027_0121, N.D. (2018)
Black and white photograph of trench.
Photograph, Negative of Trench, 2000.027_0123, N.D. (2018)
Black and white photograph of trench.
Photograph, Negative of Trowel on Ground, 2000.027_0190, N.D. (2018)
A black and white photograph of a trowel on the ground.
Photograph, Negative of Two Individuals and a Sieve, 2000.031_0008 (1994)
Black and white photograph of two individuals using a sieve in a wooded area.
Photograph, Negative of Two Individuals at Field Site, 2000.031_0083 (1994)
Black and white photograph of two individuals working at a field site with a soil sifter.