Title: An Engelmann spruce seed source study in the central Rockies /
Authors: Shepperd, Wayne D.; Jeffers, Richard M.; Ronco, Frank.; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Publisher: Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture,
Year: 1981
Subjects: Engelmann spruce Provenance trials.; Trees Seedlings.; Trees Rocky Mountains Growth.