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7Argitaratua 1987Conference Proceeding Liburua
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8Argitaratua 1992“...Proceedings of the 33rd U.S. Symposium on Rock Mechanics....”
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10Argitaratua 1995“...Proceedings of the 35th U.S. Symposium on Rock Mechanics...”
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15Argitaratua 1971Conference Proceeding Liburua
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