TY  - BOOK
AU  - Pirone, p.p.
AU  - Hartman, J.R 
TI  - Tree Maintenance 
SN  - 0195043707
U1  - 635.977 PIR 
PY  - 1988///
CY  - New York 
PB  - Oxford University 
KW  - Ornamental trees
ER  -