The fixation of nitrogen in some Colorado soils /
by Wm. P. Headden.
APA Citation
Headden, W. Parker. (1910). The fixation of nitrogen in some Colorado soils. Fort Collins, Colo.: Agricultural Experiment Station of the Agricultural College of Colorado.
MLA Citation
Headden, William Parker, 1850-1932. The Fixation of Nitrogen In Some Colorado Soils. Fort Collins, Colo.: Agricultural Experiment Station of the Agricultural College of Colorado, 1910.
Warning: These citations may not always be complete (especially for serials).