1. W.F. Lankford, K. G. Lynn, W J. Kossler, A. T. Fiory, R. P. Minnich and C. E. Stronach, Nucl. Instr. and Meth. 185 (1981) 469.
2. C.F. Stronach, W.J.J. Lindemuth, K. G. Petzinger, A.K. Kossler, T. Fiory, R.W.F. Lankford, J. J. Singh and P. Minnich, G. Lynn, Phys. Rev. B20 (1979) 2315.
3. C.E. Stronach, K. R. Squire, A. S. Arrott, B. D. Patterson, B. Heinrich, W. J. Lankford, A. T. Fiory, W. J. Kossler and J.J. Singh, Jour. of Mag and Mag. Nat. 25 (1981) 187.
4. A.S.J. rrott, B. Heinrich, C. E. Stronach and W. J. Lankford, App. Phys., in press
5. W.J.B. Kossler, M. Namkung, R. I. Grynszpan, C. E. Stronach, D. Patterson, W. Kündig and P. F. Meier, private communication.