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181Published 1974Subjects “...Oil pollution of rivers, harbors, etc....”
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182Published 1974Subjects “...Oil pollution of rivers, harbors, etc....”
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183
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184Published 1974Subjects “...Thermal pollution of rivers, lakes, etc. Environmental aspects Congresses....”
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185
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186
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187
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188
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189
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190
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191
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192Published 1991Subjects “...Sewage disposal in rivers, lakes, etc....”
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193by Oxenham, Stephen, 1953-Subjects “...Rivers New Zealand South Wairarapa District....”
Published 1993
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194Published 2014SubjectsBook
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195by Langham, Ian, 1942-Subjects “...Rivers, W. H. R. (William Halse Rivers), 1864-1922....”
Published 1981
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196
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197
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198
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199Published 1977Subjects “...Wild and scenic rivers New Zealand....”
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200Published 1972Subjects “...Rivers Congresses....”
Conference Proceeding Book