TY  - BOOK
AU  - Stielt, W. M.
TI  - Comparative cone production in young red pine planted at different spacing
PY  - 1971///
CY  - Ottawa
PB  - Canadian Forestry Service. Departament of the Environment
KW  - Árboles
KW  - Espaciamiento
KW  - Conos
KW  - Pinus resinosa
ER  -