1. 1. American Association of Blood Banks: Supply, demand, and human life. 1970.
2. 2. American National Red Cross: Blood center operations for the years ended June 30, 1970 and 1971. 1970, 1971.
3. 4. Brookdale Hospital, Brooklyn, N. Y.: Unpublished data obtained from Multiphasic Systems, Inc. of Norristown, Pa.
4. 5. Bulletin of the Metropolitan Life Insurance Company. July, 1970.