TY  - BOOK
AU  - Morgenstern, E. K.
TI  - Introgressive hybridization in red spruce and black spruce
KW  - Hibridación vegetal
KW  - Picea mariana
KW  - Picea rubens
N1  - Sobretiro de: Univ. Toronto Fac. Forestry. Tech. Rep. No. 4. pp. 1-46, 1964
ER  -