00333nam a2200121Ia 4500008004100000082001100041100002000052245003800072260005000110300001300160600001900173650001900192140224s9999    xx            000 0 und d  a632 K9  aWheeler, B.E.J.  aAn introduction to plant diseases  aLondonbEnglish Language Book Societycc 1969  aix,373p.  aB.E.J. Wheeler  aPlant diseases