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A monograph of the Bucerotid or family of the hornbills Plate XXXVI . Keulemans litk It RHYTIDOCEROS SUBRUFICOLLIS HanTiarb imp Plate XXXVI Illustration biodiversitylibrary org title Elliot Daniel Giraud NameFound Rhytidoceros subruficollis Biodiversity Heritage Library monograph of the Bucerotid or family of the