Willoughby, T. C., See, R. B., & Schroder, L. J. (1989). Stability of nitrate-ion concentrations in simulated deposition samples used for quality-assurance activities by the U.S. Geological Survey. U.S. Geological Survey.
Chicago Style (17th ed.) CitationWilloughby, Timothy C., Randolph B. See, and L. J. Schroder. Stability of Nitrate-ion Concentrations in Simulated Deposition Samples Used for Quality-assurance Activities by the U.S. Geological Survey. Denver, Colorado: U.S. Geological Survey, 1989.
MLA (9th ed.) CitationWilloughby, Timothy C., et al. Stability of Nitrate-ion Concentrations in Simulated Deposition Samples Used for Quality-assurance Activities by the U.S. Geological Survey. U.S. Geological Survey, 1989.
Warning: These citations may not always be 100% accurate.