The term PLYWOOD SOURCES can be summarized as the sources of plywood. Plywood is a type of manufactured wood panel made from thin sheets of wood veneer. It is one of the most widely used wood products and is used in construction, furniture making, and other applications. The most common source of plywood is fir, which is a type of coniferous tree found in North America, Europe, and Asia. Other sources of plywood include pine, spruce, and larch.