test (1) persistance (1) exposition (1) expérience scientifique (1) effet (1) Bénin (1) Indexes (1) Securities industry (1) Rates (1) Wealth (1) Values (1) Topographical surveying (1) Securities (1) Seashore (1) Sandy soils (1) Representative government and representation (1) Reforestation (1) Rauvolfia (1) Plantations (1) Plant communities (1) Pigeons (1) Persistence (1) Performances (1) Operant behavior (1) Nature (1) Inheritance and succession (1) Fuelwood (1) French (1) Forests and forestry (1) Experiments (1)