Smogorzhevsky, A.S. <br/><br/>
Lobachevskian geometry   
by A.S.Smogorzhevsky, Tr. by V. Kisin 
 - Moscow  MIR Publishers  1976 
 - 71p. 
 - Little Mathematics Library .
<br/><br/><label>Dewey Class. No.: </label>512.12  / N76