TY  - BOOK
AU  - Petrides, George A.
TI  - A field guide to trees and shrubs: : northeastern and north-central United States and southeastern and south-central Canada
T2  - The Peterson field guide series
U1  - 582.16 
PY  - 1986///
CY  - Boston, Mass.
PB  - Houghton Mifflin
KW  - Árboles
KW  - Canada
KW  - E.U.A
KW  - Arbustos
N1  - 59-217
ER  -