000 00304 am a2200121 a 4500
100 1 _aCulbertson, C.C.
245 1 _aSwine performance record litter comparisons
260 _aAmes
_c1930
300 _a1-116 p.
942 _2udc
_cB
440 _aIowa Extension Service Bulletin No. 277
901 _aS51760
999 _c109440
_d109440