@article {Stein:1986:0736-2935:333,
title = "Concentric drill steels for noise reduction of percussion drilling",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "1986",
volume = "1986",
number = "3",
publication date ="1986-07-21T00:00:00",
pages = "333-336",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1986/00001986/00000003/art00050",
keyword = "14.3.2, 41.3",
author = "Stein, Robert R. and Aljoe, William W.",
abstract = "",
}