Nielsen, U. <br/><br/>
New developments for tropical surveys prove successful. 

 - Ottawa :  Forest Management Institute,  (1978?). 
 - 12 p. 
<br/><br/> Ponencia presentada en : International symposium on Remote Sensing for Observation and Inventary of Earth Resources and the Endangered Envirenment. Freiburg, Alemania, 1978 
<br/><br/><label>LCCN: </label>32477 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bosques--Inventarios.<br/>Fotografía aérea.