000 00311 am a2200121 a 4500
100 1 _aMetcalfe, T.P., Scott, G.A.
245 1 _aPit silos
260 _aWashington
_c1917
300 _a1-8 p.
942 _2udc
_cB
440 _aUnited States Department of Agriculture. Farmers Bulletin No. 825
901 _aS48628
999 _c104792
_d104792