FIRST WISCONSIN <FWB> TO BUY MINNESOTA BANK First Wisconsin Corp said it plans to acquire Shelard Bancshares Inc for about 25 mln dlrs in cash, its first acquisition of a Minnesota-based bank. First Wisconsin said Shelard is the holding company for two banks with total assets of 168 mln dlrs. First Wisconsin, which had assets at yearend of 7.1 billion dlrs, said the Shelard purchase price is about 12 times the 1986 earnings of the bank. It said the two Shelard banks have a total of five offices in the Minneapolis-St. Paul area.