Climate: Seasons and Cycles
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Halfpenny, J. and Ozanne R. (1989). Winter: An ecological handbook. Bouler, CO: Johnson Publishing Company.
Lawlor, E.P. (1998). Discover nature in winter: Things to know and things to do. Mechanicsburg, PA: Stackpole Books.
Leaner, C. (1980). Seasons of the tallgrass prairie. New York: W. Morrow Co.
Lynch, W. (1984). Married to the wind. Vancouver, BC: Whitecap Books.
Raymo, C. (1992). The soul of the night: An astronomical pilgrimage. Saint Paul, MN: Hungry Mind Press.