TY  - RPRT
TI  - Third cooperative survey of the California condor
AU  - F.C. Sibley
AU  - R.D. Mallette
AU  - J.C. Borneman
AU  - P.S. Dalen
PY  - 1968
UR  - https://pubs.usgs.gov/publication/5220174
ID  - 5220174
ER  -