Haruta Ovidiu, University of Oradea, Bugwood.org

Clemson University - USDA Cooperative Extension Slide Series , Bugwood.org

I. Blakey Lockman, USDA Forest Service, Bugwood.org

Robert L. Anderson, USDA Forest Service, Bugwood.org

USDA Forest Service - Pineville, LA , USDA Forest Service, Bugwood.org

Mike Schomaker, Colorado State Forest Service, Bugwood.org

Donald Owen, California Department of Forestry and Fire Protection, Bugwood.org

USDA Forest Service - Northeastern Area , USDA Forest Service, Bugwood.org

I. Blakey Lockman, USDA Forest Service, Bugwood.org

USDA Forest Service - Northern and Intermountain Region , USDA Forest Service, Bugwood.org

Garland N. Mason, USDA Forest Service, Bugwood.org

Joseph OBrien, USDA Forest Service, Bugwood.org