Chen, A. H. (1998). Nitrate concentrations in ground water in the paleovalley alluvial aquifers of the Nemaha Natural Resources District, Nebraska, 1989 and 1994-96. U.S. Geological Survey.
Chicago Style (17th ed.) CitationChen, Abraham H. Nitrate Concentrations in Ground Water in the Paleovalley Alluvial Aquifers of the Nemaha Natural Resources District, Nebraska, 1989 and 1994-96. Lincoln, Nebraska: U.S. Geological Survey, 1998.
MLA (9th ed.) CitationChen, Abraham H. Nitrate Concentrations in Ground Water in the Paleovalley Alluvial Aquifers of the Nemaha Natural Resources District, Nebraska, 1989 and 1994-96. U.S. Geological Survey, 1998.
Warning: These citations may not always be 100% accurate.