TY  - RPRT
TI  - Evaluation of a reproductive index for estimating productivity of grassland breeding birds
AU  - M.R. Morgan
AU  - C. Norment
AU  - M.C. Runge
PY  - 2010
DO  - 10.1525/auk.2009.09132
UR  - https://pubs.usgs.gov/publication/70035268
ID  - 70035268
ER  -