@article {Keller:1981:0736-2935:557, title = "About traffic noise levels in developing countries, their numerical values and their prediction", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1981", volume = "1981", number = "3", publication date ="1981-10-06T00:00:00", pages = "557-560", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1981/00001981/00000003/art00022", keyword = "76.1.1, 52.3", author = "Keller, Y. and Schaudinischky, L.", abstract = "", }