American Conifer Society, PO Box 3422, Crofton, MD 21114-0422, (410) 721-6611, conifersociety@aol.com, www.conifersociety.org. John Martin.

American Society of Consulting Arborists, 15245 Shady Grove Road, Suite 130, Rockville, MD 20850, (301) 947-0483, Fax (301) 990-9771, dlees@mgmtsol.com. Diana Lees, member services manager.

Elm Research Institute, 11 Kit St., Keene, N.H. 03431, (603) 358-6198, Fax (603) 358-6305, libertyelm@webryders.com, www.libertyelm.com. John P. Hansel, executive director.

Illinois Arborist Association, PO Box 860, Antioch, IL 60002, (877) 617-8887, Fax (262) 857-6677, iaa@wi.rr.com, www.illinoisarborist.org. April Toney, executive director.

International Society of Arboriculture, PO Box 3129, Champaign, IL 61826-3129, (217) 355-9411, Fax (217) 355-9516, isa@isa-arbor.com, www.isa-arbor.com.

Long Island Arboricultural Association Inc., PO Box 565, Farmingdale, NY 11735, Phone/Fax (516) 454-6550, Liaatrees@aol.com. Jean Brown, executive secretary.

Maryland Arborist Association, 50 W. Baltimore St., Taneytown, MD 21787, (888) 638-7337, Phone/Fax: (410) 756-2627. Chris Klimas, president.

Massachusetts Arborists Association, 8-D Pleasant St., South Natick, MA 01760, (508) 653-3320, Fax (508) 653-4112, maarbassn@aol.com. www.MassArbor.org.

Michigan Forestry and Park Association Inc., 409 W. Ionia St., Lansing, MI 48933, (517) 482-5530, Fax (517) 482-5536, mfpa1926@hotmail.com.

Midwestern Chapter International Society of Arboriculture, 1547 Virginia Drive, Ellisville, MO 63011, (636) 386-8733, jr4stree@juno.com, www.mwisa.unl.edu. James Rocca, executive director.

Missouri Arborist Association, PO Box 1075, Independence, MO 64050, (816) 325-7557, Fax (816) 325-7474. Jim Martin, secretary.

Monmouth County Shade Tree Commission, PO Box 1255, Freehold, N.J. 07728-1255, (732) 431-7903, Fax (732) 866-3558. David C. Shaw, superintendent.

The National Arbor Day Foundation, 100 Arbor Ave., Nebraska City, NE 68410, (402) 474-5655, Fax (402) 474-0820, www.arborday.org. John Rosenow, president.

National Arborist Association/Tree Care Industry, 3 Perimeter Road, Unit 1, Manchester, NH 03103, (603) 314-5380, Fax (603) 314-5386, naa@natlarb.com, www.natlarb.com.

Nebraska Arborist Association, PO Box 81414, Lincoln, NE 68501, (402) 476-3852, Fax (402) 476-6547, naa@assocoffice.net. June Remington, executive director.

New Jersey Shade Tree Federation, 93 Lipman Drive , Cook College, New Brunswick, NJ 08901, (732) 246-3210, Fax (732) 246-3210. Bill Porter.

New York State Arborists, ISA Chapter, P.O. Box 58, Latham, NY 12110, (518) 783-1800, Fax (518)783-0700, newyorkstatearborists.com. Matthew Mosher, president.

Pennsylvania-Delaware Chapter of the International Society of Arboriculture, PO Box 293, Bedminster, PA 18910, (215) 795-0411, Fax (215) 795-0823, www.penndelisa.org. Elizabeth Wertz, executive secretary.

Society of Municipal Arborists, c/o Jerri Lattaie, PO Box 641, Watkinsville, GA 30677, (706) 769-7412, Fax (706) 769-7307, urbanforestry@prodigy.net, www.urban-forestry.com. Jerii Lattaie, executive director.