How to obtain soil samples for analysis / Hockensmith, R. D.(Roy Douglas),1905- text Fort Collins, Colo. : Colorado Agricultural College, Extension Service, [1930] eng application/pdf COABNRBC100674 Colorado Agriculture Bibliography Soils COAB_62677179.pdf "http://www.acns.colostate.edu/?page=copyright"
How to obtain soil samples for analysis /
Hockensmith, R. D.(Roy Douglas),1905-
text
Fort Collins, Colo. : Colorado Agricultural College, Extension Service,
[1930]
eng
application/pdf
COABNRBC100674
Colorado Agriculture Bibliography
Soils
COAB_62677179.pdf
"http://www.acns.colostate.edu/?page=copyright"