AUGUSTA — The Maine Legislature let stand three of the four vetoes issued by Gov. Paul LePage before formally adjourning its 2011-12 session.

During a swiftly moving process that barely took a half day, lawmakers sustained the governor’s veto of a $20 million bond issue for research and development initiatives, meaning it will not go to voters. Lawmakers also upheld LePage’s veto of bills to allow fraternal and veterans’ organizations to operate up to five slot machines each, and to limit the borrowing power of the Maine Governmental Facilities Authority, killing both.

But both the House and Senate mustered the two-thirds vote needed to override the veto of a bill to provide financial support for teachers seeking certification by the National Board for Professional Teaching Standards, meaning it becomes law.