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Highways and foundations in black cotton soils
(1973-04)
Black cotton soils are one of those clays with a high content of montmorillenite. These have a very high plasticity leading to high rates of expansion on wetting followed by shrinkage and considerable cracking on drying. ...
The transformation of the land tenure system, land appropriation and formation of the ruling class in the mauri country (Niger)
(1973-11)
The difference in kind between the pre-colonial and the postcolonial relations of production can he noticed through the gradual dissolution of relations based on a personal tieless gift-giving based on the market economy. ...