Access to the full image is restricted.
- 35mm slide: 10634
- World Region
- North America
- United States, Multiple Regions
- United States
- Map showing average number of days without a killing frost.
- Image Categories
- Map: Geographic/natural features
- Source Type Detail
- Book Citation: "Frost and the Growing Season," by William Gardner Reed; Fig. 116, p. 39. In: Atlas of American Agriculture: Climate. Washington, D.C.: Government Printing Office, July 1918.
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