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- [3] NOISE-REDUCTION AT AIRPORTS PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS PART 1-DESIGN AND CONSTRUCTION, 1974, 56 (NOV): : 613 - 614
- [4] NOISE-REDUCTION BY BARRIERS JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1973, 53 (01): : 339 - &
- [6] NOISE-REDUCTION OF CENTRIFUGES FETT WISSENSCHAFT TECHNOLOGIE-FAT SCIENCE TECHNOLOGY, 1987, 89 (13): : 556 - 559