| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c4992 _d4992 |
||
| 003 | OSt | ||
| 005 | 20210331112309.0 | ||
| 008 | 171115b xxu||||| |||| 00| 0 eng d | ||
| 040 | _cNARA | ||
| 100 |
_920831 _aCentral Envioronmental Authority |
||
| 245 | _aWater Pollution Survay with an Ultra Light Aircraft, Colombo | ||
| 260 |
_bCentral Envioronmental Authority, _c1986, |
||
| 300 |
_a77p. _c28cm. |
||
| 650 | 0 |
_914377 _aWater Pollution Survay |
|
| 650 | 0 |
_914379 _aColombo |
|
| 650 | 0 |
_914378 _aUltra Light Aircraft |
|
| 942 |
_2udc _cREF |
||