TY  - RPRT
TI  - Factors associated with arrival densities of grasshopper sparrow ( Ammodramus savannarum ) and baird's sparrow ( A. bairdii ) in the upper great plains
AU  - M.A. Ahlering
AU  - Douglas H. Johnson
AU  - John Faaborg
PY  - 2009
DO  - 10.1525/auk.2009.08154
UR  - https://pubs.usgs.gov/publication/70035259
ID  - 70035259
ER  -