|a [Portland, Or.]
|b Pub. by the Northwest regional council in cooperation with the Pacific Northwest regional planning commission [and] the Bonneville power administration
|c [1942?]
300
|a 16 numb. l. of maps.
|c 30 x 48 cm.
500
|a Cover title.
500
|a "Some of the maps were originally prepared to illustrate special research studies sponsored by the Pacific Northwest regional planning commission."--Foreword, dated December, 1941.
506
|a Access restricted. For use in Northwest Room only.