Evaluation of X-ray densitometry to identify tree-ring boundaries of two deciduous species from semi-arid forests in Brazil

1. Pagotto, M.A.
2. DeSoto, L.
3. Carvalho, A.
4. Nabais, C.
5. Tomazello Filho, M.
6. Ribeiro, A.
7. Lisi, C.S.