00425pam a2200157 a 450000500170000000800410001702000180005804100080007608200190008410000190010324500550012226000440017730000150022165000120023665000190024820230318131007.0910206r19911975nyua     b    001 0 eng    a9780486667454  aeng00a530.412bGRA/W1 aGraff, Karl F.10aWave Motion in Elastic Solids /cby Karl F. Graff.  aNew York :bDover Publications,cc1975.  axv, 649p.  0aSolids. 0aElastic waves.