found: Work cat.: 2007020532: 4-D framework of continental crust, 2007.
found: Encycl. earth system sci.
found: Facts on File dict. geol. geophys.(The crustal rocks that underlie the continents)
found: Oxford companion Earth.
found: USGS geologic glossary, May 16, 2007(continental crust: the rigid outer layer of relatively low density rock that makes up continents)
found: Wikipedia, May 15, 2007(Continental crust; the continental crust is the layer of granitic, sedimentary, and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves)
