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by Machado,Helena
by Cowling, Camillia; Machado, Maria Helena Pereira Toledo; Paton, Diana; et al.
by Harris, Bernard; Galvez, Lina; Machado, Helena
by Camillia Cowling; ?Maria Helena Pereira Toledo Machado; ?Diana Paton
by Machado, Ana Maria; Martinez, Helena
by Azevedo, Susana Garrido; Brandenburg, Marcus; Carvalho, Helena; et al.
by Cruz, Helena; Machado, José Saporiti; Costa, Alfredo Campos; et al.