23d National Watershed Congress : theme : Alternatives in Watershed Management, June 27-30, 1976, Bi

23d National Watershed Congress : theme : Alternatives in Watershed Management June 27-30 1976 Bi

出版社：[S.l. : s.n., 1976]

出版年：1976

作者：National Watershed Congress

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23d National watershed Congress.

作者：National Watershed Congress
出版社：n.p: n.d, c1976.
出版年：1976

20th national watershed congress/ Theme "landusw in watersheds" June 3-6,1973 Holiday inn plaza.

ISBN：CNY2.50
出版社：Wichita: Kansas, 1973
出版年：1973

Twentieth National Watershed Congress

出版年：2004

20th national watershed congress/ Theme "landusw in watersheds" June 3-6,1973 Holiday inn plaza.

出版社：Wichita: Kansas, 1973
出版年：1973

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作者：National Watershed Congress
出版社：[S.l. : s.n., 1971]
出版年：1971

20th National Watershed Congress : theme-"land use in watersheds"

作者：National Watershed Congress(
出版社：Wichita Kansas: [s.n.] c1973.
出版年：1973