1. Brown B. Hematology Principles and Procedures. 5th ed. Philadelphia, PA: Lea and Febiger; 1988:80.
2. Williams WJ. Hematology. 4 ed. New York, NY: McGraw-Hill; 1990.
3. Turgeon M. Clinical Hematology Theory and Procedures. Baltimore, MD: Williams & Wilkins; 1985: 311-315.
4. Coulter GenS [system operator's guide]. Hialeah, FL: Coulter Corporation; 1996.
5. Garrity P, Walters G. Concepts in New Age Hematology. Deerfield, IL: Baxter Diagnostics.