1. MAINTENANCE OF THE ISOLATED FOETUS
2. Altman P. L., Dittmer D. S. Metabolism (the Federation of American Societies for Experimental Biology). Bethesda, Maryland (1968). 385
3. COMPOSITION OF AMNIOTIC FLUID
4. Umbreit W. W., Burris R. H., Stauffer S. F. Manometric Techniques. Burgess Publ. Co, Minneapolis (1957). 4