Wolfram Research
Wolfram Math World: Surface of Revolution
This math site from MathWorld.com explains what a surface of revolution is, a formula for the surface area of such a surface, this site contains many relevant links, examples. A standard parametric formula is given, formulas for...
University of Illinois
University of Illinois Urbana Champaign: Chickscope Eggmath: The Shape of an Egg
An interactive page offering a view of a rotating egg, information on rotational symmetry, and definitions of related topics.