Where to find geodesic dome plans?

A geodesic dome is an almost spherical structure based on a network of struts arranged on great circles (geodesics) lying approximately on the surface of a sphere. The geodesics intersect to form triangular elements that have local triangular rigidity and yet also distribute the stress across the entire structure. It is the only man-made structure that gets proportionally stronger as it increases in size. When completed to form a full sphere, it is known as a geodesic sphere.