52 ENVIRONNEMENT | MT 5211 milieu naturel | BT1 faune | BT2 vie sauvage | RT aviculture [5631] | grippe aviaire [5631] | volaille [5631]
52 ENVIRONMENT | MT 5211 natural environment | BT1 animal life | BT2 wildlife | RT avian influenza [5631] | poultry [5631] | poultry farming [5631]