TY  - RPRT
TI  - Alternative silvicultural approaches to timber harvesting: Variable retention harvest systems
AU  - J.F. Franklin
AU  - D.F. Berg
AU  - D. Thornburg
AU  - J. C. Tappeiner
PY  - 1997
UR  - https://pubs.usgs.gov/publication/70194151
ID  - 70194151
ER  -