Nitrate occurrence in U.S. waters (and related questions) : a reference summary of published sources from an agricultural perspective

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100	1	⊔	‡aFedkiw, John.
245	1	0	‡aNitrate occurrence in U.S. waters (and related questions) : ‡ba reference summary of published sources from an agricultural perspective / ‡cprepared by John Fedkiw.
260	⊔	⊔	‡aWashington, D.C. : ‡bU.S. Dept. of Agriculture, ‡c[1991]
300	⊔	⊔	‡aiii, 35 p. ; ‡c28 cm.
500	⊔	⊔	‡a"September 1991."
500	⊔	⊔	‡aShipping list no.: 91-084-P.
504	⊔	⊔	‡aIncludes bibliographical references (p. 33-35).
538	⊔	⊔	‡aMode of access: Internet.
650	⊔	0	‡aNitrates ‡xEnvironmental aspects ‡zUnited States.
650	⊔	0	‡aNitrates ‡xPhysiological effect.
650	⊔	0	‡aAgricultural pollution ‡zUnited States.
650	⊔	0	‡aWater ‡xPollution ‡zUnited States.
710	1	⊔	‡aUnited States. ‡bDept. of Agriculture.
740	0	⊔	‡aNitrate occurrence in US waters (and related questions)
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