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  1. 1
    Published 1978
    Amherst, Mass. : Northeast Appropriate Technology Network, Inc., 1978-1979.
    v.
  2. 2
    Published 1979
    Greenfield, Mass. : Northeast Appropriate Technology Network, Inc., 1979-1981.
    v. : ill.
  3. 3
    Published 1981
    Greenfield, Mass. : Northeast Appropriate Technology Network, Inc., 1981-
    v. : ill.

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