1. New neptinium isotopes, 230Np and 229Np
2. Alpha Decay ofU227
3. R.J. Silva, R.L. Hahn, K.S. Toth, O.L. Keller, C.E. Bemis, M.L. Mallory and P.F. Dittner, Phys. Rev., to be published.
4. A. Hartwig, private communications.
5. University physics;Sears,1955