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1.- 30th International Geological Congress. Beijing, China, 4-14 August 1996
Congreso - International Geological Congress (30. 1996 .Pekín)
[S.l.: s.n., 1996?]
I/10-5-1/4
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2.- Documents of the 30th International Geological Congress
Congreso - International Geological Congress (30. 1996 .Pekín)
Beijing: Geological Publishing House, 1996
I/13-1-4
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