00326nam a2200109Ia 450000500170000000800410001702000150005805000170007310000230009024500670011326000360018020251229192545.0251229s9999    xx            000 0 und d  a0121039803  aSB 761  .B54  aBlanchard O Robert 0aField and Laboratory Guide to Tree pathologycRobert Blanchard  aNewYorkb  Academic pressc1981