Seminar on monitoring systems for environmental control november 3-7, 1986 

 - Gaborone  SADCC Soil and Water Conservation and Land Utilization Programme  1986 
 - 252p.  30cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental monitoring
<br/><br/><label>LC Class. No.: </label>EAF QTO TD193.S46 No.13