![](http://www.alamy.com/thumbs/6/C6A5DF40-7B8E-469B-A47B-F3E6158A46B1/MA72N3.jpg)
. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station .
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforagep, bookyear1923