1. Standards American Association of Blood Banks, trial edition. Phoenix, AZ, 1957
2. WHO Expert Committee on Biological Standardization. Technical Report Series 626. Geneva, Switzerland, World Health Organization, 1978
3. WHO Expert Committee on Biological Standardization. Technical Report Series 786. Geneva, Switzerland, World Health Organization, 1989
4. Quality Control in Blood Transfusion Services. Strasbourg, France, Council of Europe, 1986