looking for any info on biological parents

I was found with my younger sister abandoned 500 meters up the Dalchun river in Choongjoo City at 5 am on7/25/1985.We were cared for for 5 days at the Choongjoo City Office.After no relatives appeared, we were admitted to the Hee Mang Baby Home through Chungwon County Office on 8/2/1985.While there we were intaken at Holt.We were both adopted out of Seoul November 1986.My name given to me by Holt adoption agency was Park, Eun Ok and my sister's given name was Park, Eun Mee. They estimated my age to be 3 yrs and my sister 1 yr younger than me.I was adopted into the United States in November 1986.I grew up in Philadelphia, Pennsylvania.
I am looking for my any info regarding my birth parents.