780Z0503: Riffles for grating-type sand trap

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http://hdl.handle.net/10217/178106
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Abstract
Note on envelope reads, "Grating - lab to field." See "228. Progress Report of Studies of the Grating Type of Sand Trap Conducted at Bellvue and Fort Collins by Walter B. Leaf, Oct.-Dec. 1934," Irrigation Research Papers, Water Resources Archive, CSU Archives and Special Collections.
Date
1934?
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