Papers read at a symposium on the future of the Vaal river (under the chairmanship of Ian Maltz) :  Johannesburg, October 30 and 31, 1961. 

 - [Johannesburg :  V.R.C.A.,  1962] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water resources development -- Vaal Valley.--Water resources development -- Vaal Valley.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Vaal River.