1.http://www.enature.com/fieldguide/showSpeciesSH.asp?curGroupID=1&shapeID=959&curPageNum=11&recnum=BD0191

eNature .com  9/20/02

2.http://animaldiversity.ummz.umich.edu/accounts/alca/a._torda$narrative.html          9/23/02

3.web.ukonline.co.uk/m.hoult/ birds/razorbill.html     9/24/02