Page:Library of Congress Classification Outline.djvu/288

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Subclass TL

TL1-4050 Motor vehicles. Aeronautics. Astronautics
TL1-484   Motor vehicles. Cycles
TL500-777 Aeronautics. Aeronautical engineering
TL780-785.8 Rocket propulsion. Rockets
TL787-4050 Astronautics. Space travel