1874. Evaluating plastics for biological purposes: Wandell, F. A. (1968). Plastic in blood transfusion—Plastic containers—Development of criteria. Biblthca haemat. no. 29, p. 978. Mason, E. C. (1968). Spectrophotometric examinations of fluids stored in plastic containers. Biblthca haemat. no. 29, p. 995. Booth, G. H., Cooper, A. W. & Robb, J. A. (1968). Bacterial degradation of plasticized PVC. J. appl. Bact. 31, 305