Herman van Herwijnen
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HvH is the index into Herman van Herwijnen's FileMaker database:
van Herwijnen, Herman (1929-2004), Slide Rule Catalogue - DVD with English descriptions and pictures of approximately 5700 slide rules, version 5.3, Nederlandse Kring Historische Rekeninstrumenten, 2003
The DVD can be obtained directly from the Kring. [1]
