Looking for Brown Family Baltimore MD USA

my name is Patricia (Brown) looking for two step sisters born in Baltimore md. USA
Possibly born in 1931 & 1935 .
have contacted 3 cousins in USA
Fathers name A. Brown (Brownie)
g mother Popiacki, Brown, then married Frankowski she passed away in 1953.
I would dearly like to contact my sisters.
any info would be greatly appreciated thank you .