1. The Enhanced Forest Inventory and Analysis Program � National Sampling Design and Estimation Procedures
2. Statistics and quality assurance for the Northern Research Station Forest Inventory and Analysis Program, 2016
3. O'Connell, B.M.; LaPoint, E.B.; Turner, J.A. [et al.]. 2013. The Forest Inventory and Analysis database: database description and users manual version 5.16 for Phase 2. Washington, DC: U.S. Dept. of Agriculture, Forest Service. (http://www.fia.fs.fed.us/library/database-documentation/).
4. USDA Forest Service. 2012. Forest inventory and analysis national core field guide, Vol. 1, field data collection procedures for Phase 2 plots, Ver. 6.0. Washington, DC: U.S. Dept. of Agriculture, Forest Service. www.fia.fs.fed.us/library/field-guides-methods-proc (accessed Oct 2014).
5. Maryland's Forests 2008