R.P.Liljestrand1,J.M.Cameron1,D.A.Hutcheon1,R.Macdonald1, W.J.Mcdonald1,C.A.Miller1,W.C.Olsen1,J.J.Kraushaar2, J.R.Shepard2,J.G.Rogers3,J.T.Tinsley4,C.E.Stronach5 Univ. of Alberta, Edmonton, Alberta1 Colorado University, Boulder, CO2 Univ. of British Columbia, Vancouver, B.C.23 University of Oregon, Eugene, OR4 United States of America35
Physics Letters,Section B99(1981)311