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by Henderson, Peter
by Martin R. Speight (University of Oxford); Peter A. Henderson (Pisces Conservation Ltd)
by Drummond, Peter; Henderson, Sam
by Peter A. Henderson (PISCES Conservation)
by T. R. E. Southwood (Univ. of Oxford, South Parks Road, Oxford); Peter A. Henderson (The Square, Pennington, Lymington, Hants)
by Bolt, H. M.; Wolff, Frederik A. De; Henderson, Peter T.