TY - JOUR AU - Derkson, Art J. PY - 1982/09/01 Y2 - 2024/03/29 TI - Great Blue Heron Concentrations JF - Blue Jay JA - bluejay VL - 40 IS - 3 SE - Articles DO - 10.29173/bluejay6262 UR - https://bluejayjournal.ca/index.php/bluejay/article/view/6262 SP - AB - ER -