Water balance (Hydrology) -- Australia. : Regional water and soil assessment for managing sustainable agriculture in China and Australia = Zhongguo yu Aodaliya qu yu nong ye chi xu fa zhan zhong de shui tu zi yuan ping jia / editors, Tim R. McVicar ... [and others]
Water balance (Hydrology) -- China. : Regional water and soil assessment for managing sustainable agriculture in China and Australia = Zhongguo yu Aodaliya qu yu nong ye chi xu fa zhan zhong de shui tu zi yuan ping jia / editors, Tim R. McVicar ... [and others]
Water birds -- Bulgaria : Mid-winter numbers of waterbirds in Bulgaria (1977-2001) : results from 25 years of mid-winter counts carried out at the most important Bulgarian wetlands / Tanyo Michev & Lyubomir Profirov
2003
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Water birds -- Bulgaria -- Burgas Region : Waterbirds of Bourgas wetlands : results and evaluation of the monthly waterbird monitoring, 1996-2002 / Milko Dimitrov [and others] ; drawings, Assen Ignatov ; cover design, Ivan Yanchev ; editor of English translation, Vladimir Pomakov
Water birds -- Conservation -- Bulgaria -- Burgas Region : Waterbirds of Bourgas wetlands : results and evaluation of the monthly waterbird monitoring, 1996-2002 / Milko Dimitrov [and others] ; drawings, Assen Ignatov ; cover design, Ivan Yanchev ; editor of English translation, Vladimir Pomakov