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Report of progress in warm-air furnace research conducted by the Engineering experiment station, University of Illinois in cooperation with the National warm-air heating and ventilating association
- "Report of progress in warm-air furnace research conducted by the Engineering experiment station, University of Illinois in cooperation with the National warm-air heating and ventilating association"
- "Report of progress in warm-air furnace research conducted by the Engineering experiment station, University of Illinois in cooperation with the National warm-air heating and ventilating association"@en