TY  - GEN
AU  - Boothroyd, Carl W
AU  - Davis, Benjamin H
AU  - Kelman, Arthur
TI  - Source book of laboratory excercises in plant pathology: source book committe of the American phyto pathological society
U1  - 581.202 8 SOU 
CY  - San Francisco, W H Freeman and Comapny
ER  -