The handbook of ecological monitoring :  a GEMS/UNEP Publication / 
edited by Robin Clarke 
 - Oxford  Clarendon Press  1986 
 - xv, 298 p.:  ill.;  24 cm. 
<br/><br/><label>ISBN: </label>0198545908 
<br/><br/><label>LCCN: </label>85-29744 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental monitoring<br/>Ecology--Technique