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Page 1: library.isgs.illinois.edulibrary.isgs.illinois.edu/Pubs/pdfs/circulars/c380pl1.pdfIsa ek 25 22 27 429 505 Redmon 23 26 26/ 26 455E 35 24 36 12 24 36 30 30/ 235 30 7 30 240 30 2/6 120