Background information on soil conservation. Performed with project BRA/69/535 assistanship (annex I to letter 4388/78)

por Kugler, W. 1423211765568, UNDP, Brasília (Brazil) eng 187536, FAO, Rome (Italy). Land and Water Development Div. eng 183515, Empresa Brasileira de Pesquisa Agropecuária, Brasilia (Brazil) por 184595
Publicado em 1980