@article {Ballagh:1991:0736-2935:67, title = "Floor by floor plantroom noise control", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1991", volume = "1991", number = "5", publication date ="1991-12-02T00:00:00", pages = "67-70", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1991/00001991/00000005/art00011", keyword = "51.6, 51.7", author = "Ballagh, Keith and Day, Christopher", abstract = "", }