Response of soft red winter wheat varieties to rates of top-dressed nitrogen on two soil types in 1966 and 1967 /
Stivers, Russell K.(Russell Kennedy),1917-author.
Day, K. M.,author.
Watkin, J. H.,author.
Alderfer, M. W.,author.
Griffith, D. R.,author.
Purdue University.Agricultural Experiment Station,publisher.
Caption title.