संदर्भ सूचना-पुस्तिका

34

❚❚      
R          
  .
 
R 
  
 
    ,    . R
        ,  
  

     .
  
L
—
 

 .
K
—
  .
H d
  . 

    
  

    
.
H
(

)
d
(

)
  .   .
  
1000    

 , "k"   
.