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A monograph of the Trochilid or family of hummingbirds Plate . HCAi 'f lith LAIj iRIT KE'R ihainuMt ' ' Plate Illustration biodiversitylibrary org title Gould John Hullmandel Walton Richter Henry Constantine Walter Cohn NameFound Glaucis ruckeri Biodiversity Heritage Library monograph of the Trochilid or family of