奥尔多·利奥波德 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "奥尔多·利奥波德" in Chinese language version.

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archive.org

  • Leopold. A Sand County Almanac. 1970: 262. A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community. It is wrong when it tends otherwise. 

eco-action.org

web.archive.org