Research:
Reefquest Centre for Shark Research: http://www.elasmo-research.org/index.html
UCL/ Grant Museum of Zoology: http://blogs.ucl.ac.uk/museums/2011/05/29/i-need-someone-who-will-love-m...
Florida Museum of Natural History: http://www.flmnh.ufl.edu/fish/sharks/fossils/
Resources:
Palaeos: http://palaeos.com/vertebrates/chondrichthyes/index.html
Digimorph: http://digimorph.org/specimens/Heterodontus_francisci/
Fishbase (general information) http://www.fishbase.org/
Drishti 3D visualisation software: http://sf.anu.edu.au/Vizlab/drishti
Avizo 3D Visulisation software: http://www.vsg3d.com/avizo/overvie
Blogs / Forums:
http://www.thefossilforum.com/index.php?/topic/10818-heterorodontie-of-s...
Conservation:
Dutch Shark Society: http://www.dutchsharksociety.org/
Sawfish Conservation Society: https://www.facebook.com/groups/91335002341/
IUCN/ Sonja Fordham: http://cms.iucn.org/what/experts/?4935/Meet-the-sharks-advocate
Shark Advocates: http://www.sharkadvocates.org/