Published in Biol Bull, in 1959, in volume 117, pages 347-355
Created: 2010-01-06, modified: 2011-06-21![](https://www.biodiversitylibrary.org/pagethumb/40315634,60,60)
Published in Mammal Study, in 1997, in volume 22, pages 45-52
Created: 2014-09-25, modified: 2014-09-25![](https://www.biodiversitylibrary.org/pagethumb/51315235,60,60)
Published in Journal of Raptor Research, in 1994, in volume 28, issue 3, pages 171-177
Created: 2017-04-07, modified: 2017-04-07![](https://www.biodiversitylibrary.org/pagethumb/40516317,60,60)
Published in Zoological Science, in 1993, in volume 10, pages 497-504
Created: 2012-09-19, modified: 2012-09-19![](https://www.biodiversitylibrary.org/pagethumb/40516165,60,60)
Published in Zoological Science, in 1993, in volume 10, pages 353-360
Created: 2012-09-19, modified: 2012-09-19![](https://www.biodiversitylibrary.org/pagethumb/40503692,60,60)
Published in Zoological Science, in 1990, in volume 7, pages 141-145
Created: 2012-09-19, modified: 2012-09-19