000 00311 am a2200121 a 4500
100 1 _aSenner, Arthur H.
245 1 _aGreenhouse heating
260 _aWashington
_c1932
300 _a1-40 p.
942 _2udc
_cB
440 _aHeating United States Department of Agriculture. Circular No. 254
901 _aS49930
999 _c106683
_d106683