Byalok, A.V. . <br/><br/>
Our Planet: The Earth /  Textual Documents 
A.V.Byalok. 
 - 1st ed. / 
 - Moscow :  Mir Publishers ,  1987. 
 - 304p. :  ill ;  17cm . 
<br/><br/><label>Subjects--Index Terms: </label>Planet Earth G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>523  / By 999 Ou