TY  - RPRT
TI  - How many kilojoules does a Black-billed Magpie nest cost?
AU  - T.R. Stanley
PY  - 2002
DO  - 10.1648/0273-8570-73.3.292
UR  - https://pubs.usgs.gov/publication/1015271
ID  - 1015271
ER  -