Detection, diagnosis and prognosis : contribution to the energy challenge / United States Department of Commerce - Washington, D.C. : U.S. Government Printing Office, 1981 - vii, 330 p. ; 28 cm. - NBS special publication ; 622 . Subjects--Topical Terms: Fracture mechanicsMetals--FractureMachinery--Reliability Dewey Class. No.: 620.1126