Development of reference material RM 7811-6 for high coercivity magnetic stripes von Albrecht, Martin, Harcken, Hans

The secondary standard reference flexible disk cartridge RM 8860 for 90 mm (3.5 in) diskettes (1 MByte, ISO Type 301) according to ISO 8860/1 von Schroeder, Hans J., Harcken, Hans

Guideline for the application of reference material RM 10994 for 90 mm 4 MByte diskettes (ISO Type 303) von Harcken, Hans, Schroeder, Hans J.

Guideline for the application of reference material RM 10994 for 90 mm 4 MByte diskettes (ISO type 303) von Harcken, Hans

Application of reference material RM 9529 according to ISO/IEC 9529-1 1989 (90 mm (3.59 in) 2MB diskettes ; a guideline for users von Schroeder, Hans J., Harcken, Hans

The secondary standard reference flexible disk cartridge RM 8860 for 90 mm (3.5 in) diskettes (1 MByte) according to ISO 8860/1 von Schroeder, Hans J., Harcken, Hans

Ein Meßsystem für Lebensdaueruntersuchungen und Signalausfallmessungen an Disketten von Harcken, Hans

Reference materials RM 7811-2 for identification cards with low coercivity magnetic stripes and RM 7811-6 for identification cards with high coercivity magnetic stripes von Albrecht, Martin, Harcken, Hans

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Reference material RM 7811-7 for identification cards with high coercivity high density magnetic stripes von Albrecht, Martin, Harcken, Hans

Application of secondary reference diskettes in testers or certifiers von Hartmann, Jürgen, Harcken, Hans, Hartke, Jerome L.

Reference material RM 8630 for 130 mm (5,25 in) "high density" flexible disk cartridges recorded on both sides von Schroeder, Hans J., Harcken, Hans

Untersuchungen zur dynamischen Beanspruchung von Stahlgehäusen der Zündschutzart druckfeste Kapselung von Harcken, Hans