File talk:Bradley M. Patten.jpg
From Embryology
- The initiation of contraction in the embryonic chick heart http://onlinelibrary.wiley.com/doi/10.1002/aja.1000530302/pdf
- Biology Data Book http://kirschner.med.harvard.edu/files/bionumbers/humandevelopment.pdf
- Full image http://ihm.nlm.nih.gov/luna/servlet/detail/NLMNLM~1~1~101426233~186482:-Bradley-M--Patten-