. "Federal register"@en . "CFR 21, food and drugs"@en . . . . . "Title 21, food and drugs"@en . "Food and drugs"@en . . . . . . . "Code of federal regulations. [Title] 21, parts 600 to 799, Food and drugs : revised as of April 1, 1999 containing a codification of documents of general applicability and future effect as of April 1, 1999 with ancillaries"@en . . . .