TY  - BOOK
AU  - Dahl,  A. L
TI  - Field work in marine ecology for  secondary  schools in tropical Countries
AV  - QH541.2. D3 1988 
PY  - 1988///
CY  - France 
PB  - UNESCO 
KW  - Marine Ecology
KW  - Study & Teaching
KW  - Marine Biology
KW  - Study  & Teaching
ER  -