000 00313 a2200133 4500
080 _a631.531
_bB 293 S
245 1 _aSeed production and longevity
_cby L.V. Barton
260 _aLondon
_c1961
650 _aSeed Production
650 _aLongevity
100 1 _aBarton, L.V.
_d
300 _a216 p.
901 _a68934
999 _c44766
_d44766