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999 _c75432
_d75432
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008 180710s9999 xx 000 0 und d
020 _a0582446309
022 _a84237
041 _aEN
082 _a631.522
_bSIM
_223
100 _aSimmonds, N.W.
_eaut
245 _aPrinciples of crop improvement
_c/by N.W.Simmonds
260 _aLondon
_bLongman
_c1979
300 _axiv, 408 pages
509 _aNS
942 _cR