Vallejos Barra, O. (1996). Productivity and relationships of the index of site with fisiographics, edafoclimatic and foliar variable for Tectona grandis L.F., Bombacopsis quinatum (Jacq.) Dugand and Gmelina arborea Roxb. in Costa Rica.
Dyfyniad Arddull ChicagoVallejos Barra, O.S. Productivity and Relationships of the Index of Site With Fisiographics, Edafoclimatic and Foliar Variable for Tectona Grandis L.F., Bombacopsis Quinatum (Jacq.) Dugand and Gmelina Arborea Roxb. in Costa Rica. 1996.
Dyfyniad MLAVallejos Barra, O.S. Productivity and Relationships of the Index of Site With Fisiographics, Edafoclimatic and Foliar Variable for Tectona Grandis L.F., Bombacopsis Quinatum (Jacq.) Dugand and Gmelina Arborea Roxb. in Costa Rica. 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.