ACOR: Hairy Cell Leukemia List
- Mailing list and support group for the disease.
- http://listserv.acor.org/archives/hairy-cell.html

ACS: Treatment of Hairy Cell Leukemia (HCL)
- Detailed guide about treatment options, causes, prevention, early detection, and diagnosis for the disease.
- http://www.cancer.org/docroot/CRI/content/CRI_2_4_4X_Treatment_of_Hairy_Cell_Leukemia_HCL_62.asp?sitearea=

NCI: Hairy Cell Leukemia
- Features information summary about the treatment of hairy cell leukemia.
- http://www.cancer.gov/cancertopics/pdq/treatment/hairy-cell-leukemia/Patient

MedlinePlus: Hairy Cell Leukemia
- Features disease description, illustrations, causes, symptoms, and treatments.
- http://www.nlm.nih.gov/medlineplus/ency/article/000592.htm

Hairy Cell Leukemia Research Foundation
- Provides education and information on HCL as well as about the organization.
- http://www.hairycellleukemia.org/