@article{ref1,
title="Tunnel-driving in the Alps",
journal="Transactions of the American Institute of Mining and Metallurgical Engineers",
year="1911",
author="Saunders, W. L.",
volume="42",
number="",
pages="436-469",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="",
issn="0096-4778",
doi="",
url="http://dx.doi.org/"
}