000 00303 am a2200121 a 4500
100 1 _aGray, H.R.
245 1 _aGreenhouse heating
260 _aIthaca
_c1954
300 _a1-31 p.
942 _2udc
_cB
440 _aGreenhouse Cornell Agricultural Experiment Station. Bulletin No. 900
901 _aS47252
999 _c103240
_d103240