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Salton, G.; Rijsbergen, C.J. van; Maron, M.E.: Panel on key issues in information retrieval (1983)
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Kaczor, S.: Reference service in an electronic age : a view from two worlds based on an SLA program (1995)
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Felleman, J.: Symposium on geographic information systems : [Themenheft] (1990)
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GIS in academic libraries (1995)
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Geographic information systems (GISs) revisited : a symposium (1997)
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