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3. Chesapeake Bay Commission, 2004. Cost Effective Strategies for the Bay, p. 13, .
4. Chesapeake Bay Foundation, 2004. Manure’s Impact on Rivers, Streams and the Chesapeake Bay: Keeping Manure out of the Water, p. 26, .
5. Chesapeake Bay Foundation, 2005. Vital signs: assessing the state of Chesapeake agriculture in 2005, p. 15, .