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  1. 1

    Technology and social change by Allen, Francis R

    Published 1957
    Book

    Technology and social change
  2. 2

    Technology and social change.

    Published 1957
    Book

    Technology and social change.
  3. 3

    Technology and social change by Allen, Francis R.

    Published 1957
    Book

    Technology and social change
  4. 4

    Technology and social change

    Published 1957
    Book

    Technology and social change

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