Heath, W. <br/><br/>
Terrestrial photogrammetric surveys of unstable terrain in Colombia /  ..., L. L. Parsley and J. W. F. Dowling 

 - Crowthorne, Berkshire :  Transport and Road Research Laboratory,  1978 
 - 39, 1 p 
 - Transport and Road Research Laboratory. TRRL Laboratory report ;  no. 816 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photographic surveying<br/>Aerial photography in road surveying
<br/><br/><label>LC Class. No.: </label>TE7 R63 no. 816