00281nam a2200109Ia 4500008004100000082001600041100002300057245002600080260003700106300001000143650001800153140113s9999    xx            000 0 und d  a634:632  M1  a" Manion, Paul D."  aTree disease concepts  b"New york : Prentice-hall, 1981"  a399p.  aPlant disease