John Richard Spence / Winston Jan Anthony Volney / Elaine M. Lefebvre / Northern Forestry Centre (Canada)

MINN:31951D02467450H

Nature

Kenneth Ian Mallett / Northern Forestry Centre (Canada)

0662231104 / 9780662231103

Armillaria root rot

Winston Jan Anthony Volney / Northern Forestry Centre (Canada)

0662231112 / 9780662231110

Bruce spanworm