National Zoological Gardens of South Africa (NZG). National Zoological Gardens of South Africa (NZG). National Zoological Gardens of South Africa (NZG). Year: 2014. Contact: Forensics@nzg.ac.za.
Barcode of Life Data Systems
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/38534633
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/38534497
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/38534493