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Pietas Publications, Waynesboro, Virginia, United States, 2015, A5, soft-back, 97 pages, new. Extremely useful work which greatly helps to unlock this difficult series. Records previously unpublished types and varieties with enlarged quality photographs making identification much simpler. Dimensions 215x140mm. New. £20.00 e-mail David at d-stuart@d-stuart.demon.co.uk to order. |