History of botanical exploration in Territorio Federal Amazonas, Venezuela / Otto Huber and John J. Wurdack. - 83 pages : folded map ; 28 cm. - Smithsonian contributions to botany : no. 56. . - Smithsonian contributions to botany : ; no. 56. . Subjects--Topical Terms: Botany--History.--VenezuelaPlant collectors--Venezuela.