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This might possibly be developed using even more online or offline sources. Please help! :) Try Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL) Try, for National Park Service material: Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL Or develop from the sources already included in the article! Thanks. -- do ncr am 00:07, 30 April 2011 (UTC)
This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||
|
This might possibly be developed using even more online or offline sources. Please help! :) Try Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL) Try, for National Park Service material: Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL Or develop from the sources already included in the article! Thanks. -- do ncr am 00:07, 30 April 2011 (UTC)