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@unpublished{TUW-120646,
    author = {Frank, Andrew U.},
    title = {Technical and Scientific Trends in GIS},
    year = {2006},
    note = {invited; talk: Civil Engineering Department, K. N. Toosi Universit{\"a}t, Teheran, Iran; 2006-12-30 -- 2007-01-01}
}