Papers of the New York attorney, relating to the 1967 New York State Constitutional Convention. Weissberg was a delegate to the convention from the 26th senatorial district, New York County. Collection includes correspondence, memorabilia, writings, New York State Constitutional committee papers and miscellany.

Papers of the American lawyer. Correspondence, press releases, speeches, and other material relating to Sand's participation in the 1967 New York State Constitutional Convention.