@phdthesis{2b6a3f9969024c41aee65a947c5caee9,
title = "Ontology spectrum for geological data interoperability",
author = "Xiaogang Ma",
note = "ITC Dissertation; 197",
year = "2011",
month = nov,
day = "30",
doi = "10.3990/1.9789061643234",
language = "English",
isbn = "978-90-6164-323-4",
series = "ITC Dissertation",
publisher = "University of Twente, Faculty of Geo-Information Science and Earth Observation (ITC)",
type = "PhD Thesis - Research UT, graduation UT",
school = "University of Twente",
}