Showing 1 - 2 results of 2 for search 'Helfrich, Jr., Harold W.', query time: 0.02s Refine Results
  1. 1

    Agenda for survival The environmental crisis - 2.

    Published 1970
    Book

    Agenda for survival The environmental crisis - 2.
  2. 2

    The environmental crisis Man's struggle to live with himself.

    Published 1970
    Book

    The environmental crisis Man's struggle to live with himself.

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