"William S. Hein & Company." . . . . . "Periodicals"@en . . "Code of federal regulations"@en . . "Special edition of the Federal register, containing a codification of documents of general applicability and future effect as of April ... with ancillaries."@en . . . . . "CFR"@en . . . . . . . . . . "Alcohol, tobacco products and firearms"@en . "Code of federal regulations. 27, Alcohol, tobacco products and firearms"@en . . . . "Electronic journals"@en .