Comparative growth of hybrid poplars and native northern black cottonwoods
By: Roy R. Silen.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Forest research notes -- no. 35.; Forest research notes (Portland, Or.) -- no. 35.
Publisher: Pacific Northwest Forest and Range Experiment Station
Published: 1947
Place of publication: [Portland, Or
Language: eng
Subjects: Poplar -- Washington (State) -- Growth.; Black cottonwood -- Washington (State) -- Growth.
Notes: Cover title.

"October 1, 1947."

Also issued online.