Justice League Of America #75 Facsimile Edition Cover A Carmine Infantino

BLACK CANARY JOINS THE JLA! When Green Arrow's identity crisis inadvertently causes the League's darker selves to take physical form and attack, the JLA requires all the help it can get. Luckily, prospective member Black Canary is on hand, having just emigrated from Earth-2—but will a new mysteriously acquired ultra-sonic power be a help or a hindrance to her?