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  1. 1
    出版 1998
    “...GE 320 .A6 .A6274...”
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    Antarctica in the environmental era /
  2. 2
    由 Cessford, Gordon, 1962-
    出版 1999
    “...G 155 .N5 .C422 a 1999...”
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    An approach to assessing the environmental impacts of tourism /

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