ELLEN JASKOL, Timers to put on perishable food items, letting you know when you bought it or opened it. December 20, 2006. (ELLEN JASKOL/ROCKY MOUNTAIN NEWS)*** (12/20/2006), [434363267] . Denver Public Library Digital Collections, accessed 17/06/2025, https://digital.denverlibrary.org/nodes/view/781965