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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...

3. 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...

4. 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...

5. 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...

6. 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...

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. 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...

9. Climate Data - Spring: Ecological Study for the Twin-Cities Metropolitan Area

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

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

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

13. Ecological Forest Communities: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Ecological Forest Communities prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities Metropolitan Area. ...

14. Economic Minerals: Ecological Study for the Twin-Cities Metropolitan Area

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

17. Existing Forest Cover and Forest Related Industry: Ecological Study for the Twin-Cities Metropolitan Area

1968. Map of Existing Forest Cover and Forest Related Industry prepared for the Metropolitan Council as a part of An Ecological Study for the Twin-Cities...

19. Existing Urbanization: Ecological Study for the Twin-Cities Metropolitan Area

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