References
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- The Geographic Education National Implementation Project. 1987 . K-6 geography: Themes, key ideas, and learning opportunities , Washington, DC : Geographic Education National Implementation Project .
- Joint Committee on Geographic Education of the National Council for Geographic Education and the Association of American Geographers (GENIP). 1984 . Guidelines for geographic education, elementary and secondary schools , Washington, DC : Association of American Geographers and National Council for Geographic Education .
- Sitterson , J. C. 1953 . Sugar country: The cane sugar industry in the South, 1753–1950 , Lexington : University of Kentucky Press .