@article{Druzhinin2014intraspecies,
author={Druzhinin, F.. and Makarov, Y..},
title={Intraspecies and age polymorphism of Norway spruce (Picea Abies (L.) Karst.) in conditions of the Vologda region},
journal={Forestry Engineering Journal},
publisher={FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov},
year={2014},
pages={24-32},
volume={3},
issue={4},
}