Whale pelvic girdle , Naturen
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On the Whale Exhibition at Bergen museum:
http://www.archimuse.com/mw2003/papers/nordbotten/nordbotten.html

Research on evolution of Whales:
Philip G. Gingerich
http://www-personal.umich.edu/%7Egingeric/PDGwhales/Whales.htm

Hans Thewissen:
http://darla.neoucom.edu/DEPTS/ANAT/Thewissen/whale_origins/index.html

On Greenland Whale pelvis at Zoological museum in Aberdeen:
http://www.abdn.ac.uk/zoohons/struthers/hind_limbs.hti

Pictures of the pelvic bones of more whales
http://www.whoi.edu/science/B/whalepelvics/cgi-bin/page.cgi

O. Abels publication on whale pelvis 1907
"Die Morphologie der Huftbeinrudimente der Cetaceen" (.pdf; 39 MB)