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