Bischoff(looking for my older sister)

My name is John Bischoff..My father is Henry Bischoff...My mother is Susan Bischoff(maiden name-Doonan)...I also have 3 more sisters.....My older sister was given up for adoption in 1962 of August of the Westchester county area of New York...If anyone has info or if your reading this my sister...I'm looking for you!