Russo et al., 1996. In: Nitrogen fixing trees for acid soils: a field manual, Powell, M. H. (Ed). Winrock International Institute for Agricultural Development

Russo, R. R.; Botero, R. B., 1996. Nitrogen fixing trees for animal production on acid soils. In: Nitrogen fixing trees for acid soils: a field manual, Powell, M. H. (Ed). Winrock International Institute for Agricultural Development