TY  - RPRT
TI  - Characterizing urban butterfly populations: The case for purposive point-count surveys
AU  - Bret J. Lang
AU  - Philip M. Dixon
AU  - Robert W. Klaver
AU  - Jan R. Thompson
AU  - Mark P. Widrlechner
PY  - 2019
DO  - 10.1007/s11252-019-00880-8
UR  - https://pubs.usgs.gov/publication/70227957
ID  - 70227957
ER  -