TY - SER AU - Andrade,T.C.G.R.de AU - Barros,N.F.de AU - Dias,L.E. AU - Azevedo,M.I.R. TI - Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla S.T. Blake cultivated in northeastern Brazil KW - EUCALIPTO KW - BIOMASSA KW - CLONE KW - MADEIRA KW - BIOENERGIA ER -