Circular
[University of Illinois Agricultural college and Experiment Station]
by Royene F. Owen ... [et al.]
University of Illinois, College of Agriculture, Extension Service in Agriculture and Home Economics 1961 Circular no. 835
所蔵館1館
by Wesley P. Flint
[University of Illinois Agricultural college and Experiment Station] 1922 Circular no. 257
by Ivan Wright
[University of Illinois Agricultural college and Experiment Station] [1922] Circular no. 259
所蔵館2館
[by Sara I. Moyer]
University of Illinois, College of Agriculture, Extension Service in Agriculture and Home Economics 1942 Circular no. 528