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المؤلفون: Feigley, H. Peter.
المساهمون: Montana Natural Heritage Program.
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_259744
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المؤلفون: Feigley, H. Peter.
المساهمون: Montana Natural Heritage Program., United States. Bureau of Land Management.
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_118834
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المساهمون: Feigley, H. Peter., Brown, Michelle., Martinez, Sam., Schletz, Kate., Montana Natural Heritage Program., Geological Survey (U.S.). Biological Resources Division.
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_81443