Shirokov, P. A.  1895-1944. <br/><br/>
A sketch of the fundamentals of Lobachevskian geometry/ 
Prepared for publication by I.N. Bronshtein. Translated from the 1st Russian ed. by Leo F. Boron, with the assistance of Ward D. Bouwsma. 
 - Groningen:  P. Noordhoff,  1964 [c1963]. 
 - 87 p.:  illus.,  22 cm. 
<br/><br/> A translation of the author's [KratkiÁi ocherk osnov geometrii Lobachevskogo] reprinted with changes, in 1950 in [Stroenie neevklidovoÁi geometrii], by P.A. Shirokov and V.F. Kagan. 
<br/><br/>Bibliography: p. 87. 
<br/><br/><label>LCCN: </label>65001069 //r84 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Hyperbolic.
<br/><br/><label>Dewey Class. No.: </label>516.1  / S558s