1. R.C. Barber, R.L. Bishop, L.A. Cambey, H.E. Duckworth, J.D. Macdougall, W. McLatchie, J.H. Ormrod, and P. van Rookhuyzen, AA Second Int. Conf. Nuclidic Masses, ed. by W.H. Johnson (Springer-Verlag, Wien, 1963), p. 393.
2. R.C. Barber, R.L. Bishop, H.E. Duckworth, J.O. Meredith, F.C.G. Southon, P. van Rookhuyzen and P. Williams, Rev. Sci. Instrum. 42, 1 (1971).
3. J.O. Meredith, F.C.G. Southon, R.C Barber, P. Williams, H.E. Duckworth, Int. J. Mass Spec. Ion Phys. 10, 359 (1972).
4. K. Kozier, Ph.D. Thesis, University of Manitoba (1977), Winnipeg, Canada, unpublished.
5. F.C.G. Southon, J.O. Meredith, R.C. Barber, H.E. Duckworth, Can. J. Phys. 55, 383 (1977).