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12 Matching Results
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Results:
1 - 12 of
12
[Historic Property, Photograph 1977-13]
Photograph of a historic property in Texas.
Date:
November 1, 1984
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Historic Property, Photograph 4564-09]
Photograph of a historic property in Texas.
Date:
July 1, 1984
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
Qualitative and Microcosm Predictions of Effects of Endothal for Control of Myriophyllum spicatum in Pat Mayse Lake, Texas
Qualitative and microcosm models were used to predict effects of herbicide application for control of Myriophyllum spicatum. Predictions were compared to data from Pat Mayse Lake, a Texas reservoir, where localized areas were treated with endothall. Although milf oil was temporarily eliminated, when endothall was used according to manufacturer's directions, no ecologically significant direct or indirect effects were observed on nontarget species or abiotic water quality. Comparisons of the predictions with field data confirmed the capabilities of this approach for estimating risk and emphasizing the importance of identifying regulating or driving factors that modify environmental impacts of aquatic weed control programs so they can be incorporated into future risk assessments.
Date:
May 1984
Creator:
Hinman, Mark L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Biardstown Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Roxton Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Lamar county [Texas].
This map is an 1878 Headright Survey Map overlaid on a 1984 TX Highway Map. It shows late twentieth century Lamar County, Texas landowners, block and tract numbers, land patents, roads, and towns. Scale [ca. 1:316,800].
Date:
1984
Creator:
unknown
Object Type:
Map
System:
The Portal to Texas History
Biardstown Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Roxton Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Petty Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Paris Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Toco Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Tigertown Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24,000
Date:
1984
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History