ASH, the American Society of Hematology web site provides information about its mission and membership details, as well as news and a peer-reviewed journal.
ASPHO, the American Society of Pediatric Hematology and Oncology web site provides information about the professional organization, as well as membership details, etc.
The Atlas of Hematology web site includes over 200 photographs of both blood and the bone marrow with detailed descriptions of various blood diseases and disorders.