TY  - RPRT
TI  - Assemblages of breeding birds as indicators of grassland condition
AU  - S.F. Browder
AU  - Douglas H. Johnson
AU  - I.J. Ball
PY  - 2002
DO  - 10.1016/s1470-160x(02)00060-2
UR  - https://pubs.usgs.gov/publication/70023953
ID  - 70023953
ER  -