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Displaying 1-2 of 2 results for author "Brownfield, Isabelle K."
Results of sample analysis of heavy-mineral deposits in the Point Lookout sandstone, southwest Colorado and northwest New Mexico [microform] / by Robert S. Zech and Isabelle Brownfield.
- Text
- [Denver, CO] : U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1990.
- 1990
Improved density gradient separation techniques using sodium polytungstate and a comparison to the use of other heavy liquids [microform] / Gary L. Skipp & Isabelle Brownfield.
- Text
- [Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1993.
- 1993
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