Dortignac, E. (1956). Watershed resources and problems of the upper Rio Grande Basin. United States Department of Agriculture.
Chicago-viite (17. p.)Dortignac, E.J. Watershed Resources and Problems of the Upper Rio Grande Basin. U.S.: United States Department of Agriculture, 1956.
MLA-viite (9. p.)Dortignac, E.J. Watershed Resources and Problems of the Upper Rio Grande Basin. United States Department of Agriculture, 1956.
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