Ducke papers on amazon flora

[Art Souther]

I am looking for two papers by Ducke on amazonian phytogeography:

(1953) Phytogeographical notes on the Brazilian Amazon
An. Acad. bras. Cienc. 25, 1-46
(1954) Notas sobre a fitogeografia da Amazonia Brasileira.
Boletim Tecnico do Instituto de Agronomia, Norte 29, 1-62

Does anyone know how a could get copies of them?

Thanks,

Art
souther at cs.utexas.edu