Wilman, Maria, 1867-1957.  Wilman, Maria, 1867-1957. <br/><br/>
The rock-engravings of Griqualand West & Bechuanaland, South Africa. 

 - [2nd ed.]. 
 - Cape Town :  Balkema,  [1968] 
<br/><br/> Folded map at back of book. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroglyphs -- Griqualand, West.--Petroglyphs -- Griqualand, West.<br/>Petroglyphs -- Botswana.--Petroglyphs -- Botswana.