"Derde Wereld: landbouw- en voedselproblemen." . . "Tchad" . . "Anthropology" . . "Pastoralisme Tchad." . . "Agrargesellschaft Tschad." . . "Antropologische aspecten." . . "Agriculture" . . . . . . . . . . . . . . . . . . . . . . . . "Agro-pastoralism in Chad as a strategy for survival an essay on the relationship between anthropology and statistics" . . . . . . . . . . . . . . . . . . . "Kinship groups; The socioeconomic setting; Sociopolitical structures; Pastoral system; Agricultural system; Alternative economic actives." . . . . . . "Agro-pastoralism in Chad as a Strategy for Survival : An Essay on the Relationship between Anthropology and Statistics" . . "Agro-pastoralism in chad as a strategy for survival : an essay on the relationship between anthropology and statistics" . "Agro-pastoralism in Chad as a strategy for survival : an essay on the relationship between anthropology and statistics" . . . . . . . . "Sociaal-economische situatie." . . "Crops" . . "Chad" . . "Systèmes agricoles Tchad." . . "Landbouw." . . "agriculture pastoralisme Tchad (république)" . . "Society" . . "Anthropologie Méthodes statistiques." . . "Tsjaad." . . "Statistical analysis" . . . .