[1]
Malavolta, E., Cruz, V.F. da e Morais, R.S. 1973. Fertilizer policy in the developing countries: the case of Brazil . Anais da Escola Superior de Agricultura Luiz de Queiroz. 30, (jan. 1973), 293-304. DOI:https://doi.org/10.1590/S0071-12761973000100022.