Twenty years of soil fertility investigations /
[R.I. Throckmorton and F.L. Duley].
APA Citation
Throckmorton, R. I. (Ray Iams)., Duley, F. L. (1935). Twenty years of soil fertility investigations. Manhattan, Kan.: Agricultural Experiment Station, Kansas State College of Agriculture and Applied Science.
MLA Citation
Throckmorton, R. I. (Ray Iams), 1886-, and F. L Duley. Twenty Years of Soil Fertility Investigations. Manhattan, Kan.: Agricultural Experiment Station, Kansas State College of Agriculture and Applied Science, 1935.
Warning: These citations may not always be complete (especially for serials).