TY  - RPRT
TI  - The relationship between parental age and reproductive effort in the California Gull (Larus californicus)
AU  - Bruce H. Pugesek
PY  - 1983
DO  - 10.1007/bf00299919
UR  - https://pubs.usgs.gov/publication/1008657
ID  - 1008657
ER  -