TY  - RPRT
TI  - Long-term trends in midwestern milkweed abundances and their relevance to monarch butterfly declines
AU  - David N. Zaya
AU  - Ian S. Pearse
AU  - Gregory Spyreas
PY  - 2017
DO  - 10.1093/biosci/biw186
UR  - https://pubs.usgs.gov/publication/70190617
ID  - 70190617
ER  -