A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534597
A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534589
A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534593