Algunos materiales para mejorar el suelo.
Contributors: Oregon State University. Extension Service.
Series: EC -- 1540-S.; Extension circular (Oregon State University. Extension Service) -- 1540-S.
Publisher: Oregon State University, Extension Service
Published: 2001
Place of publication: [Corvallis, Or.]
Language: spa
Subjects: Organic wastes as soil amendments.
Notes: Caption title.

"Octubre del 2001."

Also available on the Internet.