TY  - RPRT
TI  - A sexing technique for California Gulls breeding at Bamforth Lake, Wyoming (Una tecnica para determinar sexos en larus californicus reproduciendose en el Lago Bamforth, Wyoming)
AU  - Bruce H. Pugesek
PY  - 1996
UR  - https://pubs.usgs.gov/publication/70203882
ID  - 70203882
ER  -