@article {3817, title = {Frost Hardiness of Picea rubens Growing in Spruce Decline Regions of the Appalachians}, journal = {Tree Physiology}, volume = {5}, year = {1989}, month = {March}, pages = {25-37}, keywords = {Climate, Forests, Pollution, Red spruce, Snow and ice}, author = {Sheppard, L. J and Smith, R. I and Cannell, M. G. R} }