H80-16/036 Wilking Collection, Simmons Service Station Addition, Casper, WY, https://drive.google.com/file/d/0BwGs7_2V6bvEU2swbHU3OEhrTlE/view?usp=drive_link&resourcekey=0-5-ke2N6LUi6RKvQ_FAy5EQ. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources.

H80-16/036 Wilking Collection, Simmons Service Station Addition, Casper, WY, https://drive.google.com/file/d/0BwGs7_2V6bvEU2swbHU3OEhrTlE/view?usp=drive_link&resourcekey=0-5-ke2N6LUi6RKvQ_FAy5EQ. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources. https://wyocomet.wyo.gov/repositories/2/digital_objects/4336 Accessed November 23, 2024.