TY  - BOOK
AU  - Bruce, Donald B.A and Schumacher, Francis X.
TI  - Forest Mensuration
U1  - G5 B3 
PY  - 1942///
CY  - New York
PB  - McGraw- Hill Book Company, Inc.
KW  - Statistics, Direct Estimate by Sampling, Indirect Estimate Based on one or more Independent Variables
ER  -