Robert K. Heldman

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Future Telecommunications: Information Applications, Services and Infrastructure
Heldman, Robert K.

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� 7.33

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Global Communications: Layered Network's Layered Services
Heldman, Robert K.

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� 9.79

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Information Telecommunications: Networks, Products and Services
Heldman, Robert K.

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� 22.21

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Telecommunications Information Millennium: A Vision and Plan for the Global Information Society
Heldman, Robert K.

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� 29.95

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Heldman: ∗isdn∗ In The Information Marketplace
HELDMAN, RK

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� 2.56

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