"The History of the Refrigerator - and Freezer." The History of the Refrigerator - and Freezer. N.p., n.d. Web. 14 Feb. 2017.
"Timeline of Refrigerators and Low-Temperature Technology." Refrigerator Timeline - History of Low-Temperature Technology. N.p., n.d. Web. 15 Feb. 2017.
"Timeline of Refrigerators and Low-Temperature Technology." Refrigerator Timeline - History of Low-Temperature Technology. N.p., n.d. Web. 15 Feb. 2017.