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| ostra-plana-europeia (Ostrea edulis) | |||
| ostra plana (Ostrea edulis); ostra plana europeia (Ostrea edulis) | |||
| ostra-plana (Ostrea edulis); ostra-redonda (Ostrea edulis (Linnaeus)) | |||
| ostra plana: 4 phrases in 2 subjects |
| Fish farming pisciculture | 1 |
| Natural resourses and wildlife conservation | 3 |