Eisiminger, Sterling K.2018-11-062018-11-061961-12EPM-066-01-004http://hdl.handle.net/20.500.11867/145603 sheets 16.5 x 11 inch, bi-folded and secured booklet style. Printed recto and verso."This bulletin summarizes information relating to studies made to determine the advisability of modifying the existing navigation project on the Willamette and Columbia Rivers, in Oregon and Washington, downstream from the Portland-Vancouver area."Rivers;