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Landis & Gyr Reviews
( 4 Articles )
Important internal articles published by Landis & Gyr / Sodeco from 1980 to 1985.
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Landis & Gyr Brochures
( 6 Articles )
Brochures issued for promotion of telephone systems produced by L&G / Sodeco.
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Cards' Production in Zoug
( 3 Articles )
The Central-Laboratory and the 1st, 2nd & 3rd generations of cards' Production.
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Saga "Holos à Gogo"
( 17 Articles )
Articles (in french) published in the INFOPUCE review from 1999 to 2002.
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General Articles
( 4 Articles )
Articles about Phonecards found in miscellaneous collectors' reviews.
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Friends
( 2 Articles )
Tributes for great collectors' Friends.
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