Tourism in the green economy /  
World Tourism Organization. 
 - Madrid :  World Tourism Organization (UNWTO),  2012 
 - ix, 156 p. : graficas 
<br/><br/><label>ISBN: </label>9789284414512 9284414512 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Turismo --Aspecto económico<br/>Turismo --Ecológico y sostenible
<br/><br/><label>Dewey Class. No.: </label>338.4791 W927to 2012