28 SOCIAL QUESTIONS | MT 2841 health | BT1 epidemiology | BT2 medical science | RT epidemic [2841] | fight against insects [5206] | insect [5211]
28 SOCIALE VRAAGSTUKKEN | MT 2841 gezondheid | BT1 epidemiologie | BT2 medische wetenschappen | RT epidemie [2841] | insect [5211] | insectenbestrijding [5206]