The term 'FINE WOOL SOURCES' can be summarized by the crossword solution of MERINOS, which is a breed of sheep that produces some of the finest wool in the world. Merinos are known for their soft, fine wool and have been bred for centuries to produce the highest quality wool. Merino wool is used in a variety of clothing items, from sweaters to socks, and is highly sought after for its warmth and durability.