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Dimmock, E.: Military systems and and equipment : classification code (1992)
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Reed, C.: INSPEC Ondisc (1993)
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INSPEC Science Abstracts : 100 years, 1898-1998 (1997)
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Orton, D.: Database review : engineering (1995)
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Schwarzwalder, R.: ¬The IEEE and electronic information (1998)
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