ผลต่างระหว่างรุ่นของ "นกกระเรียนมงกุฎเทา"

 

 

* BirdLife International (2009). [http://www.iucnredlist.org/apps/redlist/details/143771/0 ''Balearica regulorum'']. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.1. Downloaded on 1 April 2010. Database entry includes justification for why this species is vulnerable

* Archibald, G. W. 1992a. African cranes for the future. Proc. First S. Afr. Crane Conf.:7-9.