1. Abbas, T. M. and Tovey, J. E., 1960, Proteins of the liquor amnii, Br. Med. J. 1:476.
2. Aherne, W., and Dunnill, M. S., 1966, Morphometry of the human placenta, Br. Med. Bull. 22:5.
3. Alford, C. A., Reynolds, D. W., and Stagno, S., 1974, Current concepts of chronic perinatal infections, in: Modern Perinatal Medicine (Gluck, ed.), p. 285, Year Book Medical Publishers, Chicago.
4. Allansmith, M., McClellan, B. H., Butterworth, M., and Maloney, J. R., 1968, The development of immunoglobulin levels in man, J. Pediatr. 72:276.
5. Ahrons, S., 1971, HL-A-antibodies. Influence on the human foetus, Tissue Antigens 1:129.