@book{697fb769c5a04e7e8129636519e3b8cd,
title = "An evaluation of the economic benefits of pneumatic dry coal cleaning processes. 4th progress report",
keywords = "official reports, Geen BTA classificatie",
author = "{de Jong}, TPR and {van Houwelingen}, JA and HJ Glass",
note = "Contract nr. 7220-PR-066. Interne class. 33% zie ... 6th progress report.",
year = "2002",
language = "Undefined/Unknown",
volume = "TA/GT.2002.31",
publisher = "Delft University of Technology",
address = "Netherlands",
}