TY  - BOOK
AU  - Ouden,P.den
AU  - Boom,B.K.
TI  - Manual of cultivated conifers: hardy in the cold and warm temperate zone 
SN  - 9024721482
PY  - 1978///
CY  - The Hague
PB  - Martinus Nijhoff
KW  - Conifers
KW  - Varieties
ER  -