TY  - RPRT
TI  - The Breeding Bird Survey: Its first fifteen years, 1965-1979
AU  - C.S. Robbins
AU  - D. Bystrak
AU  - P.H. Geissler
PY  - 1986
UR  - https://pubs.usgs.gov/publication/5230189
ID  - 5230189
ER  -