রেফারেন্স পুস্তিকা

168
 
  p:
q
w
e
t
r
y
 
0
q
 
       
38, 54, 61,
113
w
  

p   M   
g . .-    
179
e
 
     
    p   
  30     
172, 180
r
  
p    -    
   >  
 - 
178
t


     

178
y
 
     n  
      p
;   
 
178