
    Brandywine Area Joint School Authority v. Van Cor, Inc., et al., Appellants.
    Argued March 22, 1972.
    
      Howard Cittis, with him Bernard Chamin, and Wolf, Block, Schorr and SoKsCohen, for appellants; Herman J. Obert, with him Franklin L. Cordon, Milton Apfelbaum, and Gibbons, Eustace & Obert, for appellee.
   Judgment affirmed.  