(left to right): Ralph David Bienfang (1905-1975) and Forrest Edward Clements (1900-1970), June 1940, Smithsonian Institution Archives, Ralph David Bienfang (1905-1975) was Professor of Pharmacognosy, University of Oklahoma, and Forrest Edward Clements (1900-1970) was Professor of Anthropology, University of Oklahoma; they are shown holding specimens of cedar poles excavated from Spiro Indian mound by a WPA-Oklahoma University archeological project..