Workbook in maritime pollution and prevention 
Oblepias, Teresita San Diego. 
 -  Philippine Foundation for Maritime Teaching Aids, Inc. (MARTA)  2000 
 - iv, 26 pages. 
9-71840022-2
M 363.73 M33 2000
                        9-71840022-2
M 363.73 M33 2000