@article {Guy:1989:0736-2501:117, title = "A Preliminary Study Model for the Absorption or Transmission of Sound in Multi-Layer Systems", journal = "Noise Control Engineering Journal", parent_itemid = "infobike://ince/ncej", publishercode ="ince", year = "1989", volume = "33", number = "3", publication date ="1989-11-01T00:00:00", pages = "117-123", itemtype = "ARTICLE", issn = "0736-2501", url = "https://ince.publisher.ingentaconnect.com/content/ince/ncej/1989/00000033/00000003/art00003", doi = "doi:10.3397/1.2827749", author = "Guy, R. W.", abstract = "", }