U. S. FOREST SERVICE 

 RESEARCH PAPER INT-51 

 1968 



NETVSL-A COMPUTER PROGRAM 

 FOR CALCULATION OF TREE VOLUMES 

 WITH INTERIOR DEFECT 



by 



ALBERT R. STAGE, RICHARD C. DODGE, and JAMES E. BRICKELL 



INTERMOUNTAIN FOREST & RANGE EXPERIMENT STATION 



FOREST SERVICE 

 U. S. DEPARTMENT OF AGRICULTURE 

 OGDEN, UTAH 84401 



