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Energy intake and productivity of Guatemalan sugarcane cutters : an empirical test of the efficiency wage hypothesis ; P. 1.
Immink, Maarten D. C., (1981)
Energy intake and productivity of Guatemalan sugarcane cutters : an empirical test of the efficiency wage hypothesis ; P. 2.
Food and energy : the situation in West Bengal
Sen, Amitabha, (1978)