Origin and formation of soils
By: by W.L. Powers.
Contributors: Oregon Agricultural College. Extension Service.
Series: Cir -- 136.; Circular (Oregon Agricultural College. Extension Service) -- 136.
Publisher: Oregon Agricultural College, Extension Service
Published: 1922
Place of publication: Corvallis, OR
Language: eng
Subjects: Soil formation.; Soils.
Notes: Caption title.

"November, 1922."