000 00306 am a2200121 a 4500
100 1 _a
_d
245 1 _aRoofing farm building
260 _aWashington
_c1961
300 _a1-28 p.
942 _2udc
_cB
440 _aFarm United States Department of Agriculture. Farmers' Bulletin No. 2170
901 _aS33411
999 _c104693
_d104693