Ryabchikov, A. <br/><br/>
The changing face of the earth : the structure  and dynamics of the geosphere, its natural ... 
<label>/ by </label> Ryabchikov, A. 
 - Moscow  Progress Publishers  1975 
 - 205p.  23 cm. 
<br/><br/>L 
<br/><br/><label>Dewey Class. No.: </label>550  / R