Hecht eff <br/><br/>
Understanding lasers    An entry-level guide.      
Hecht eff 
 - 2 
 -  1994 
<br/><br/><label>Standard No.: </label>22829 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>C51:72, N4