Journal of Avian Biology, 1997 Staff Author(s) Citation Harris, M.P., Freeman, S.N., Wanless, S., Morgan, B.J.T. & Wernham, C.V. 1997. Factors influencing the survival of Puffins Fratercula arctica at a North Sea colony over a 20-year period. Journal of Avian Biology 28: 295. Staff author(s) Chris Wernham