EC89-219 1989 Nebraska Swine Report
M A Giesemann,E R Peo,Austin Lewis, Duane Reese, J D Hancock, Murray Danielson, Marvin B Rhodes,Merwin L Frey, A R Doster, Homer E Connell, Donald G Levis, C J Marolf, Edgar T Clemens, M C Brumm, Donald L Ferguson, William Ahlschwede,Dwane R Zimmerman, J D Kopf,R K Johnson,T E Socha,J W Keele, Larry Young, Chris R Calkins mag（1989）
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animal science,sow,gestation,economics,herd,estrus,housing,mating,nutrition,teaching,phosphorus
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