PERTAMINA Petrochemical Seminar  Plaju)  (1975 : <br/><br/>
PERTAMINA Petrochemical Seminar, Plaju, April 10th - 15th - 1972  Proceedings 

 - Jakarta  Pertamina  1972 
 - 217 p. : ill. ; 27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum chemicals industry--Indonesia--Congresses