U.S. Forest Service 

 Research Paper INT-20 

 1965 



A TECHNIQUE FOR SAMPLING POPULATIONS OF 

 THE MOUNTAIN PINE BEETLE 



by 



Robert W . Carlson and Walter E . Cole 



INTERMOUNTAIN FOREST AND RANGE EXPERIMENT STATION 



Forest Service 

 U.S. Department of Agriculture 



Ogden, Utah 

 Joseph F. Pechanec, Director 



