316 A.2d 127 The Pennsylvania Turnpike Commission, Petitioner, v. Sanders Thomas, Inc., Respondent. Commonwealth Court of Pennsylvania.Argued December 4, 1973 March 11, 1974. Public contracts — Sovereign immunity — Constitution of Pennsylvania, Article I, Section 11 — Act of 1937, May 20, P. L. 728 — Arbitration — Act of 1927, April 25, P. L. […]