000 00441nam a2200145Ia 4500
008 140208s9999 xx 000 0 und d
044 _aU.S.A.
080 _a635.21 B467P
100 _aBeukema, H.P.
245 _aPotato improvement some : factors and facts
_cH.P. Beukema and D.E. Van Der Zaag
260 _bInternational Agricultural Centre
_aWegeningen
_c1979
300 _a224p.;18cm.
700 _aZaag, D.E. Van Der
942 _2udc
_cPB
999 _c10215
_d10215