海量图书期刊资源，随时随地畅享阅读乐趣
Factors Influencing Choice of Balsam Fir Twigs from Thinned and Unthinned Stands by MooseI. D. Thompson, R. E. McQueen, P. B. Reichardt, D. G. Trenholm and W. J. Curran · Oecologia · 1989