@article {Norman:1974:0736-2935:601, title = "Noise control of U.S. postal service equipment: Letter sorting machines", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1974", volume = "1974", number = "1", publication date ="1974-09-30T00:00:00", pages = "601-604", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1974/00001974/00000001/art00127", keyword = "53.1, 53.2", author = "Norman, Renny S.", abstract = "", }