Annual report of the forest insect and disease survey : forestry Branch 1968.

Annual report of the forest insect and disease survey : forestry Branch 1968.

出版社：Ottawa : The Authority of the Minister of Fisheries and Forestry, 1969.

出版年：1969

作者：Canada Department of Fisheries and Forestry.

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Annual report of the World Meteorological Organization, 1968.

作者：World Meteorological Organization.
出版社：Geneva : World Meteorological Organization, 1969.
出版年：1969

The International Rice Research Institute : annual report 1968.

作者：International Rice Research Institute.
ISBN：CNY3.20
出版社：Laguna, Phil. : IRRI, c1968.
出版年：1968

The International Rice Research Institute : annual report 1968.

作者：International Rice Research Institute.
出版社：Laguna, Phil. : IRRI, c1968.
出版年：1968

Research report, 1968.

作者：Plant Research Institute. Ottawa.
出版社：Ottawa : Queen''s Printer, [196?].,Ottawa : [s.n.], [n.d.]
出版年：1968

9th Annual report : for year 1968.

作者：Czechoslovak Academy of Sciences.
出版社：Praha : Czechoslovak Academy of Sciences, Hydrobiological Laboratory, 1968.
出版年：1968

Publications of the Geological Survey 1968.

作者：Geological Survey (U.S.)
出版社：Washington : Govt. Print. Off., 1969.
出版年：1969