Helicopter operations of the Geological Survey of Canada. 

 - [Ottawa]  Dept. of Mines and Technical Survey, Canada  [1959] 
 - xi, 60 p.  illus., maps, diagrs., tables. 
 - Its Bulletin  54 .
 - Bulletin (Geological Survey of Canada) ;  54. .
<br/><br/> Abstract in English and French. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>gs 61000031  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helicopters.<br/>Geology--Fieldwork.<br/>Geology--Canada--Maps.<br/>Photographic surveying.<br/>Geology--Surveys.--Canada
<br/><br/><label>LC Class. No.: </label>QE185  / .A43 no. 54