Stopa, Roman. <br/><br/>
Structure of Bushman and its traces in Indo-European / 
Roman Stop a. 
 - Wrocaw :   Zakad Narodowy im. Ossolinskich,   1972. 
 - 216 p. :   ill. ;   25 cm. 
<br/><br/>  Summary in Polish.   Continued by Clicks, their form, function, and their transformation. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Khoisan languages-- Grammar, Comparative.
<br/><br/><label>Dewey Class. No.: </label>496.1