000 00298 am a2200121 a 4500
100 1 _aElford, F.C.
245 1 _aArtifical incubation
260 _aOttawa
_c1929
300 _a1-4 p.
942 _2udc
_cB
440 _aIncubation Canada Department of Agriculture. Circular No. 71
901 _aS46498
999 _c102098
_d102098