http://php.med.unsw.edu.au/embryology/index.php?title=K12_Comparative_Embryology

https://mitpress.mit.edu/books/embryology-evo-devo

http://www.ucsd.tv/evolutionmatters/lesson2/study.shtml

http://www.ucmp.berkeley.edu/history/haeckel.html

http://evolution.berkeley.edu/evosite/evo101/IIIC6aOntogeny.shtml

http://darwins-god.blogspot.com/2010/02/jerry-coyne-why-embryology-proves.html

http://teacher.scholastic.com/activities/explorations/adaptation/index.htm

http://bioweb.cs.earlham.edu/9-12/evolution/HTML/live.html

http://www.preservearticles.com/201101123107/complete-information-on-embryological-evidences-of-evolution.html

Citations