Information on Blood Transfusion related matters produced by external bodies held at Brentwood, 1937- circa 1965. Technical Bulletins Nos. 1-19 from Armour Pharmaceutical Company Ltd, "Blood Group Antigens and Antibodies as applied to blood transfusion" by Ortho Pharmaceutical Corporation. Royal Navy Blood Transfusion Service Units Instructions for use. Blood transfusion information 1937- circa 1965