Test of hemlock railroad ties completed
By: by Forest Utilization Service
Series: Research note / Northern Rocky Mountain Forest & Range Experiment Station -- no. 51; Research note (Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.)) -- no. 51.
Publisher: Northern Rocky Mountain Forest and Range Experiment Station
Published: 1947
Place of publication: Missoula, Mont
Language: eng
Subjects: Railroad ties; Western hemlock
Notes: Caption title.

"April 21, 1947."