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Publishers' international ISBN directory : 3 Bde (1995)
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Publishers' international ISBN directory : 3 Bde (1996)
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Publishers' international ISBN directory plus : CD-ROM ed (1996)
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Publishers' international ISBN directory : 3 Bde (1997)
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Publishers' international ISBN directory : 3 Bde (1998)
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Publishers' international ISBN directory plus : CD-ROM ed (1997)
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Bibliografia nazionale italiana : 1(1958) - 36(1993) ungeteilt; 39(1996), 1-12 (gedruckte Ausg. + Diskette) (1996-)
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- 19. 3.1998 11:23:22
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Publishers' international ISBN directory : 3 Bde (1999)
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