“You could hop on ebay and bid on some anatomical skull models (which run between $20 and $80).
Or, you could just download these complete reference photos prepared by jimiyo exclusively for the Go MediaZine. They’re awesome! Inside there are 15 high res skulls at different angles and cut out from the background. So get your Wacom tablet set up and spend an evening drawing over these reference photos. It’s fun and really great practice.”
Grab them at gomediazine.com