NATIONAL NOTEBOOK: Bloomington, Minn.; A $600 Million Shopping Mall
LEAD: CONSTRUCTION will begin here next spring on one of the nation's largest shopping malls - the $600 million, 2.7 million-square-foot Mall of America. When the three-level complex opens in May 1992, visitors to its 800 stores and food outlets will discover for diversion a 300,000-square-foot enclosed amusement park.