©2013 National Research Council of Thailand
Pilai Poonswad,editor. 1998. The Asian hornbills : ecology and conservation. Bangkok:National Centre for Genetic Engineering and Biotechnology;
Pilai Poonswad,editor. (1998) The Asian hornbills : ecology and conservation. National Centre for Genetic Engineering and Biotechnology:Bangkok.
Pilai Poonswad,editor. The Asian hornbills : ecology and conservation. Bangkok:National Centre for Genetic Engineering and Biotechnology, 1998. Print.
Pilai Poonswad,editor. (1998) The Asian hornbills : ecology and conservation. National Centre for Genetic Engineering and Biotechnology:Bangkok.