(No Title)
収録刊行物
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- Proc. 1st Int. Congr. of Rock Mech., Lisbon
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Proc. 1st Int. Congr. of Rock Mech., Lisbon 1 509-513, 1966
Proc. 1st Int. Congr. of Rock Mech., Lisbon 1 509-513, 1966