Haavisto, V. Fred Collecting black spruce cones / V. Fred Haavisto, Ed Commanda, Dan A. Kott. -- Sault Ste. Marie : Canadian Forest Service, 1995. -- 1 dvojlist : 5 obr., 2 fot. ; 28 cm. -- (Frontline ; No. 32). -- ISBN 0-662-22759-X : 20.00 Sk

I. Commanda, Ed
II. Kott, Dan A.

630*232.3+630*232.312+630*174.7
ZV001