TY  - RPRT
TI  - Alien species in national parks: Drawing lines in space and time
AU  - D. Houston
AU  - Edward G. Schreiner
PY  - 2002
DO  - 10.1046/j.1523-1739.1995.09010204.x
UR  - https://pubs.usgs.gov/publication/1015670
ID  - 1015670
ER  -