1. American Forest Foundation. (2007). Project learning tree: Pre K-8 environmental education activity guide. Washington, DC: American Forest Foundation.
2. Berry, N. (1998). A focus on art museum/school collaborations. Art Education, 51(2), 8–14.
3. Brown, S. L. (2012, January). Outcomes of four environmental science institutes on urban middle school students. Paper presented at the annual meeting of Association for Science Teacher Education (ASTE), Clearwater.
4. Brown, S. L., Votaw, N. L., & Tretter, T. R. (2010). Teachers connecting urban students to their environment. In A. M. Bodzin, B. S. Klein, & S. Weaver (Eds.), The Inclusion of environmental education in science teacher education (pp. 191–207). New York: Springer Science+Business Media.
5. City of Louisville, Kentucky. (2010). A world class innovation: Louisville Water Company completes its riverbank filtration project. LouisvilleWater.com Newsroom. Retrieved 5 June, 2013, from
http://www.louisvilleky.gov/LWC/News/2010/Riverbank+Filtration+Project+Completed.htm