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Alberani, V.; Pietrangeli, P.D.: Grey literature in information science : production, circulation and use (1995)
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Kreitz, P.A.: ¬The virtual library in action : collaborative international control of high-energy physics pre-prints (1996)
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Erlinger, C.: Spatial planning and its need for national and regional bibliographies of grey literature (2019)
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Swanepoel, M.: ¬The availability of electronic grey literature (1993)
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Fekrane, C.: Grey literature access via Internet, using WAIS (1994)
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