Apparently, there is a "Baltimore (Philadelphia Road) Russian Cemetery" on Rt. 7. It's in Harford County near Mountain Road (rt. 152):
http://www.cwgc.org/find-a-cemetery/cemetery/4001621/Baltimo.... It is now Trinity Lutheran School. That might be where they are?
ROSS, HARRY Private 207551 06/05/1916 Canadian Infantry Canadian BALTIMORE (PHILADELPHIA ROAD) RUSSIAN CEMETERY