00366cam a2200145ua 4500020001000000041001000010082001600020100002200036245008100058250001200139260004200151300001200193365001000205504000500215 c12.00 aengh a538bSWI/PR aSwift, Bevan.H . aPrinciples of magnetic crack detection / cH.Bevan Swift.hTextual Documents a1 / b. aLondon : bE & F.N.Spon Ltd , c1944. a105 ; . a12.00 a