রেফারেন্স পুস্তিকা

304
N   :     
k

d p
G  N   
             
              
h      
 
 

W (Q)        W (Q)
 

p    
   1 
3   
  
    
 
p    
   4 
2   
  
    
 
p      ,  4 
2  
p      ,  1 
3  
 

  