TY  - RPRT
TI  - Decline of ranid frog species in western North America: Are bullfrogs (Rana catesbeiana) responsible?
AU  - M.P. Hayes
AU  - M.R. Jennings
PY  - 1986
DO  - 10.2307/1564246
UR  - https://pubs.usgs.gov/publication/1007559
ID  - 1007559
ER  -