TY  - RPRT
TI  - A useful device for sampling understory woody vegetation
AU  - T.H. Ripley
AU  - F.M. Johnson
AU  - W.P. Thomas
PY  - 1960
DO  - 10.2307/3895057
UR  - https://pubs.usgs.gov/publication/5220319
ID  - 5220319
ER  -