Sarafyan, Nubar <br/><br/>
The principle of least efforts & evolution / 
N. Sarafyan. 
 - Yerevan :  Printing house of NAS RA,  s.l. 
 - 265 p. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution