Jacki Kellum on Twitter: "Tip for Drawing & Painting Faces - Learn to Block in and Shade the Protrusions on the Head. True for real, abstract, & Illustration. Learn how to draw
Gerimi Drawing Comics 057: Bring me the head of George Bridgman - YouTube
Heads, Features and Faces (Dover Anatomy for Artists) by Bridgman, George B.: Very Good (2016) | Books Unplugged