Plan of study to determine if the isotopic ratios [delta] ¹⁵N and [delta] ¹⁸O can reveal the sources of nitrate discharged by the Mississippi River into the Gulf of Mexico [microform] / by William A. Battaglin ... [et al.] (U.S. Geological Survey open-file report ; 97-230)
Plan of study to determine if the isotopic ratios [delta] ¹⁵N and [delta] ¹⁸O can reveal the sources of nitrate discharged by the Mississippi River into the Gulf of Mexico [microform] / by William A. Battaglin ... [et al.]