Cochrane, Janet. <br/><br/>
Expedition field techniques :  ecotourism surveys / 
Janet Cochr ane. 
 - London :  Expedition Advisory Centre,  1994. 
 - 34 p. ;  20 cm. 
<br/><br/>Includes bibliographical references (p. 26-34) 
<br/><br/><label>ISBN: </label>0907649653 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecotourism.