Lloyd J. Harris Pie Co., “Aluminum Kettles, Troughs and Cookers,” Digital Collections, accessed December 8, 2025, https://digitalcollections.library.gvsu.edu/document/44561.
A black and white photo of a man stirring something in a kettle in front of a large number of aliminum troughs. The caption reads: "For your protection we use nothing but aliminum throughout our entire Bakery."