1. Clason's guide map of Minnesota
1920?. Clason Map Co. Scale approximately 1:1,050,000 (W 97⁰00ʹ--W 89⁰40ʹ/N 49⁰00ʹ--N 43⁰00ʹ). "The green guide series"--Cover. Includes inset of "Cook County, n.e. corn...
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2. Clason's guide map of Minnesota.
1919?. Clason Map Co. Scale approximately 1:1,050,000.
3. Surface Water Drainage Problems: Ecological Study for the Twin-Cities Metropolitan Area
1970-06. Clason Map Co.