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Statistical Comparisons of Record-keeping Farms and a Random Sample of Iowa Farms for 1939

Adolf KozlikBryce RyanElliott McClureJames Abel StarrakJohn A. HopkinsKenneth Maxwell AutreyLawrence William WittPaul Riddle RecordRaymond James JessenDwight Leonard EspePeter DieboldClawson Young Cannon

出版	Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1942
URL	http://books.google.com.hk/books?id=2Ox3AQAACAAJ&hl=&source=gbs_api