Organization and performance of Ohio farm operations in 1990 / Thomas T. Stout, Lynn Forster, Gail E. Edgington. -- Wooster : The Ohio State Univ., 1992. -- 22 s. : 11 obr., 24 tab. -- (Research Bulletin 1189). farmy poľnohospodárske * poľnohospodárstvo Ohia