Nitrate in ground water in the Great Valley carbonate subunit of the Potomac River Basin

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100 1 ⊔ ‡aFerrari, Matthew J.
245 1 0 ‡aNitrate in ground water in the Great Valley carbonate subunit of the Potomac River Basin / ‡cby Matthew J. Ferrari and Scott W. Ator.
260 ⊔ ⊔ ‡aTowson, Md. : ‡bU.S. Geological Survey, ‡c[1995]
300 ⊔ ⊔ ‡a[6] p. on 1 folded leaf : ‡bcol. ill., maps (some col.) ; ‡c28 cm.
490 0 ⊔ ‡aPotomac River Basin
490 0 ⊔ ‡aWater-resources investigations report ; ‡v95-4099
500 ⊔ ⊔ ‡aCaption title.
504 ⊔ ⊔ ‡aIncludes bibliographical references (p. [6]).
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aAgriculture ‡xEnvironmental aspects ‡zPotomac River Watershed.
650 ⊔ 0 ‡aNitrates ‡xEnvironmental aspects ‡zPotomac River Watershed.
650 ⊔ 0 ‡aGroundwater ‡xPollution ‡zPotomac River Watershed.
700 1 ⊔ ‡aAtor, Scott W.
710 2 ⊔ ‡aGeological Survey (U.S.)
899 ⊔ ⊔ ‡a39015037740472 ‡bScience Serials
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