$MIDDLEFIELD BANC CORP(MBCN)$ 8-K - Current report Filed: 2016-07-28 AccNo: 0001193125-16-661033 Size: 606 KBItem 1.01: Entry into a Material Definitive AgreementItem 7.01: Regulation FD DisclosureItem 9.01: Financial Statements and Exhibits 网页链接