Works Cited

• A Technical Guide to Urban and Community Forestry
  http://www.na.fs.fed.us/spfo/pubs/uf/techguide/values.htm
• Massachusetts Arborists Association
  http://www.massarbor.org/treetips/benefits.html>
• Tree Council
  http://www.treecouncil.org.uk/info/packng2.html
• Ned's shade tree evolution site
  http://shade-trees.tripod.com/families/selections/blackjack_oak.html
• Ohio State University
  http://snr.osu.edu/const.htm
• Urban forestry south
  http://www.urbanforestrysouth.org/pubs/ufmanual/index.htm
• Cornell University
  http://www.hort.cornell.edu/department/faculty/bassuk/uhi/chart2.html
• University of Connecticut
  http://www.hort.uconn.edu