1968. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
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1967. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1967. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1968. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1968. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1979. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1972. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1968. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.
1993. Projection: Polar Stereographic Projection: Standard Parallel -71º; Series: USGS Sketch Maps. United States Geological Survey.