Precise positioning systems for hydrographic surveying :  TRIDENT III, no.39-2-7 / 
International Hydrographic Bureau. 
 - Monaco :  International Hydrographic Bureau,  [1977].  
 - 19 p :  ill. ;  30 cm. +  pbk. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrographic surveying. 
<br/><br/><label>Dewey Class. No.: </label>623.8932