The Cycle in U.S. cattle numbers as related to selected supply variables / John W. Goodwin, Danny R. Pippin. -- Fayetteville : Arkansas agric. experiment stat., 1990. -- 29 s. : 9 obr. -- (Report Series 314). kravy * ekonomika chovu dobytka * ceny * mlieko * teľatá * seno * krmivá jadrové