Conservation and the gospel of efficiency : the progressive conservation movement, 1890-1920 /

Ижил төстэй зүйлс

• Conservation and the gospel of efficiency : the progressive conservation movement, 1890-1920 /
  -н: Hays, Samuel P.
  Хэвлэсэн: (1999)
• The conservation program handbook a guide for local government land acquisition /
  -н: Tassel, Sandra
  Хэвлэсэн: (2009)
• The conservation program handbook a guide for local government land acquisition /
  -н: Tassel, Sandra
  Хэвлэсэн: (2009)
• Proactive strategies for protecting species : pre-listing conservation and the Endangered Species Act /
  Хэвлэсэн: (2015)
• Proactive strategies for protecting species : pre-listing conservation and the Endangered Species Act /
  Хэвлэсэн: (2015)