ven mma tee cee am ae ee ae ce REFERENCES E.E. Held, &.P. Gessel, sie ancienmnenemnenmmnenemnemetiints: (continued) L.J. Matson and R.F. Billings. Autoradiography of Sectioned Soil Cores. Proceedings of the Symposium on Radioisotope Sample Measurement Techniques in Medicine and Biology, I.A.E.A. (1965). (In Press) UNIVERSE . UN. (ik