Nineteen hundred thirty-one Supplement to Mason's Minnesota statutes (1927 thru 1931) : containing the text of the acts of the 1929 and 1931 Sessions of the Legislature, both new and amendatory, and notes showing repeals, together with annotations from the various courts, state and federal, construing the Constitution, statutes, charters and court rules of Minnesota / edited by William H. Mason, Editor-in-Chief, W. H. Mason, Jr., Assistant editory.