@article {Williams:1991:0736-2935:1173, title = "ASPAK - A sound propagation package", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1991", volume = "1991", number = "3", publication date ="1991-12-02T00:00:00", pages = "1173-1176", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1991/00001991/00000003/art00076", keyword = "24, 76.4", author = "Williams, W.", abstract = "", }