TY  - BOOK
AU  - Harder, Leslie F.
AU  - Seed, H. Bolton, coaut.
ED  - University of California, Berkeley. Earthquake Engineering -Research Center
TI  - Determination of penetration resistance for coarse-grained -soils using the becker hammer drill / by Leslie F. Harder a-nd H. Bolton Seed
CY  - Berkeley, Calif. : e Engineering Research Center
N1  - "A report on research sponsored by the National Science Fou-ndation""May 1986"
ER  -