Slack-filled packages : hearings, Seventieth Congress, first session, on H.R. 487, an act to amend an act entitled "An act for preventing the manufacture, sale, or transportation of adulterated or misbranded or poisonous or deleterious foods, drugs, medicines, and liquors, and for regulating traffic therein, and for other purposes", approved June 30, 1906, as amended. May 8-9, 1928 (1928)