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H. Doc. 60-976 - Strength of concrete beams: Results of tests of 108 beams (first series) made at the structural-materials testing laboratories, by Richard L. Humphrey. [U.S. Geological Survey Bulletin 344.]

Strength of concrete beams: Results of tests of 108 beams (first series) made at the structural-materials testing laboratories, by Richard L. Humphrey. [U.S. Geological Survey Bulletin 344.]
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