Field experiments in spraying apple orchards in 1913 and 1914 Pickett, B. S. 1882- contributor text book Urbana, Ill University of Illinois Agricultural Experiment Station 1918 1918
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ENG Cover title. Apples Diseases and pests Spraying and dusting in agriculture Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station), no. 206 Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station), no. 206 https://www.biodiversitylibrary.org/bibliography/45732 16893238 10.5962/bhl.title.45732 RQF