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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 | |
Page:Library of Congress Classification Outline.djvu/288
