291. Zinc oxid. United States Government specification for leaded zinc oxide, dry and paste, Federal Specifications Board, Standard specification 9, officially adopted by Federal Specifications Board, Feb. 3, 1922, for use of Departments and independent establishments of Government in purchase of materials covered by it. 2d edition. Bookmark Corporate/Agency Authors: Standards Bureau and Commerce Department Publisher: Standards Bureau Date: July 3, 1922 [reprint with changes 1924] SuDoc number: C 13.4:88/3