@article {Koenig:1977:0093-9978:120, title = "Air Transport Noise Reduction", journal = "Noise Control Engineering", parent_itemid = "infobike://ince/nce", publishercode ="ince", year = "1977", volume = "8", number = "3", publication date ="1977-05-01T00:00:00", pages = "120-130", itemtype = "ARTICLE", issn = "0093-9978", url = "https://ince.publisher.ingentaconnect.com/content/ince/nce/1977/00000008/00000003/art00003", doi = "doi:10.3397/1.2832061", author = "Koenig, Robert J.", abstract = "", }