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The economic impacts of newly irrigated areas in the Ebro Valley
Sánchez Chóliz, Julio, (2000)
OECD technical assistance to the Centre for Agricultural Research and Development of the Ebro Region (Spain)
(1971)
Drainage and reclamation of salt-affected soils
Martinez Beltran, J., (1978)
A further evaluation of the policy for the integration of the Amazon region (1974-1976)
Kleinpenning, J. G. M., (1978)
Peopling the purple land : a historical geography of rural Uruguay, 1500 - 1915
Kleinpenning, Jan M. G., (1995)
Rural Paraguay : 1870 - 1932
Kleinpenning, Jan M. G., (1992)