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1. Agricultural Production by Type: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Agricultural Production by Type prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area...

2. Annual Precipitation: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Annual Precipitation prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. Scale 1:2...

3. Aquifer Recharge Zones: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Aquifer Recharge Zones prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. Scale 1...

4. Average Annual Precipitation: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Average Annual Precipitation prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. S...

5. Average Number of Frost-Free Days: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Average Number of Frost-Free Days prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Ar...

6. Bakutis Coast - Marie Byrd Land: Antarctica

1968. Projection: Polar Stereographic Projection: Standard Parallel -71°; Series: USGS Sketch Maps.

7. Bedrock Geology: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Bedrock Geology prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. Scale 1:250,000.

8. Blackburn Nunatak: Antarctica

1968. Projection: Polar Stereographic Projection: Standard Parallel -80°14'; Series: USGS 1:250,000 Topographic Reconnaissance Series.

9. Caloplaca Hills: Antarctica

1968. Projection: Polar Stereographic Projection: Standard Parallel -80°14'; Series: USGS 1:250,000 Topographic Reconnaissance Series.

10. Climate Data - Fall: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Climate Data - Fall prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. Scale 1:25...