... survey workers recorded the following details for each family visited every month: movements, in money and in kind, of income and expenses, loans and repayments, economic and ... the climate, nature, germination and flowering and animal behaviour and for their social and economic life. Scientists, in their laboratories and their offices, have another ... effective occu-pants and users of land in rural economic areas (that is, land regularly used for rural dwellings, 398 Thierno Aliou Ba and Bernard Croiisse agriculture, and stock-breeding,...