Ushakov, D. N. <br/><br/>
Orthographic dictionary = Oрфографический словарь/ 
D.N. Ushakov, S.E. Kruchkov. 
 - Moscow:  Prosvesheniye,  1970. 
 - 208 p.  20.5 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Russian grammar<br/>Dictionary.
<br/><br/><label>LC Class. No.: </label>PG2111