@inproceedings{d0bdd8e2b9ea41fcae7a390cc6163d7f,
title = "An extension of the stand - up time in the Q - system rock mass classification up to 200 years based on the limestone mines in the Netherlands",
keywords = "ADLIB-ART-419, ESA",
author = "H.R.G.K. Hack and D.G. Price",
year = "1990",
language = "English",
pages = "3559--3561",
editor = "D.G. Price",
booktitle = "6th International congress International Association of Engineering Geology, 6-10 August 1990, Amsterdam, Netherlands / D.G. Price (ed.), pp. 3559-3561",
}