Gerstmann Syndrome Support Network 
Information about the organization, the services provided and contact details.
http://www.iser.com/gerstmann.htmlGerstmann's Syndrome 
Information sheet compiled by the National Institute of Neurological Disorders and Stroke (NINDS).
http://www.ninds.nih.gov/health_and_medical/disorders/gerstmanns.htm
NORD: Gerstmann Syndrome 
Offers synonyms, a general discussion and further resources.
http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Gerstmann%20Syndrome