American Society of Hematology
http://www.hematology.org/

Atlas of Hematology
http://pathy.med.nagoya-u.ac.jp/index-e.html/

Blood
http://WWW.bloodjournal.org/

International Society on Trombosis and Haemostasis
http://www.med.unc.edu/isth/

Med Pharm: Hematology
http://www.medfarm.unito.it/education/hemato.html/