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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. Base map of Monroe County, Indiana

1968. Moran, W. H. (William H.) and Heisterkamp, A. J. Blue line map. 'May 1, 1951, revised January 1, 1968.' Shows township and range numbers, section boundaries without numbers, State and National For...

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 - Summer: Ecological Study for the Twin-Cities Metropolitan Area

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

11. 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.

15. 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...

17. 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:...

20. Foundation Conditions: Ecological Study for the Twin-Cities Metropolitan Area

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