Farming systems development and soil conservation
Norman, David, Douglas, Malcolm
Farming systems development and soil conservation - Rome FAO of the United Nations 1994 - 173 p. - No. 7; FAO Farm System Managem .
631.58:631.459:631.61
Farming systems development and soil conservation - Rome FAO of the United Nations 1994 - 173 p. - No. 7; FAO Farm System Managem .
631.58:631.459:631.61