1974 annual report of the inland waters section /  
National Programme for Environmental Sciences. 
 - Pretoria, South Africa :   The Committee,   1974. 
 - vi, 150 f. 
<br/><br/><label>Subjects--Corporate Names: </label><br/>National Programme for Environmental Sciences (South Africa).  Inland Waters Section 
<br/><br/><label>Dewey Class. No.: </label>574.929