Van Der Wal, H.R. <br/><br/>
Prospecting Offshore Placers: Drilling Ships, Equipment and Positioning Techniquies  by H.R. Van Der Wal 

 - 1st. ed 
 - Bangkok, Thailand  Commitee for Co-Ordination of Joint Prospecting for Mineral Resources in Asian Areas (CCOP)  1980 
 - 94p  ill  1980 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic geology--Drill equipment and Offshore Placers--Asian