Paul Mark Sandler, Baltimore, Md. (Raymond F. Altman, and Ulman & Cohan, Baltimore, Md., on brief), for appellants.
William F. Mosner, Towson, Md., for appellees.
Before HAYNSWORTH, Chief Judge, and CRAVEN and WIDENER, Circuit Judges.
PER CURIAM:
We affirm on the opinion of the District Judge. Smith v. Koerber, 352 F. Supp. 591 (D.Md.1972).
Affirmed.