620.11274 UL8N <br/>
NICHOLS, R.W. <br/>
       ULTRASONIC INSPECTION OF HEAVY SECTION STEEL COMPONENTS :  
 / 
 .- LONDON: ELSEVIER APPLIED SCIENCE,  1988 
 .- ,15,,,,,,. 
<br/><u>Subject Headings:</u> <br/>BIOLOGICAL CHEMISTRY;<br/>ENZYMES;