RICHARDSON SQUARE OPENING—The new Richardson Square Mall at Plano and Belt Line Roads opened last week in grand fashion. A marching band from Berkner High School played as International Miss World cut the ribbon with a $10,000 scissors from Zales Jewelers. Cut ting the ribbon are: Rob Snowden, mall manager; Rev. Staff Photo by Bob Greenfield Edwin Johnson of St. Paul’s parish; G. R. Willsey, man ager of Montgomery Ward's; Christy Rains, International Miss World and a Richardson High School sophomore Edward J. DeBartolo, Jr., of the Edward J. DeBartolo Corp., Leroy Schiller, manager of Sears, and Howard Hern, city councilma