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| 100 | 1 | _aDiamond,A.W. and F.L.Filion | |
| 245 | 1 | 0 | _aThe value of birds.World Conference of the International Council for Bird preservation,19ยบ |
| 250 | _a | ||
| 260 |
_aCambridge - INGL _bInternational Council of Bird Preservation _c1987 |
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| 300 |
_a267p. _cLila 21cm |
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_aICBP technical publication _vv.6 |
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