No.	Title	Date
541	Marjory Stoneman Douglas talks about the Sugar Industry’s Back Pumping into the Everglades	1983-06-15
542	Marjory Stoneman Douglas talks about the use of water in South Florida	1983-06-25
543	Marjory Stoneman Douglas talks about water management and the Army Corps of Engineers	1983-06-15
544	Marjory Stoneman Douglas talks about welfare and foreign countries	1983-06-16
545	Marjory Stoneman Douglas talks about when Poachers destroyed a Rookery during a Houseboat Tour	1983-06-16
546	Marjory Stoneman Douglas talks about where the Everglades begins and its various tributaries and flows	1983-06-15
547	Marjory Stoneman Douglas talks about why she loves the Everglades	1983-06-15
548	Marl Prairie/Slough Gradients; Patterns and Trends in Shark Slough and Adjacent Marl Prairies (CERP monitoring activity 3.1.3.5), First Annual Report (2005)	2006-01-16
549	Mature Cypress Head (Stops 81-IV) ( 25 photograph sets )
550	Mercury Concentrations in Fish from Treatment Wetlands in the Northern Everglades	2001-07
551	Miami Canal	1904/1920
552	Miami Canal, 1919-1921	1919/1921
553	The Miami River where it meets the Everglades, ca. 1902-1910.	1910
554	Mid-Term Report, Florida Coastal Everglades Long Term Ecological Research Program	2015-03-13
555	Midway Key (Stop 81- XIV) ( 20 photograph sets )
556	Miscellaneous correspondence	1916
557	Miscellaneous correspondence	1916
558	Miscellaneous correspondence	1916
559	Modeling light use efficiency in a subtropical mangrove forest equipped with CO2 Eddy Covariance	2013
560	The Monitoring and Assessment Plan (MAP) Greater Everglades Wetlands Module- Landscape Pattern- Ridge, Slough, and Tree Island Mosaics: Year 1 Annual Report	2009-10-21