TY  - RPRT
TI  - Determination of hatching date for eggs of black-crowned night-herons, snowy egrets and great egrets
AU  - T. W. Custer
AU  - G.W. Pendleton
AU  - R.W. Roach
PY  - 1992
UR  - https://pubs.usgs.gov/publication/1003202
ID  - 1003202
ER  -