H80-16/171 P and R Building Addition (Shell Oil Company), Casper, WY, https://drive.google.com/file/d/0BwGs7_2V6bvEYTBIY3VVV0tNWE0/view?usp=drive_link&resourcekey=0-j-OGtQO8Va-ymqIXXc3vvQ. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources.

H80-16/171 P and R Building Addition (Shell Oil Company), Casper, WY, https://drive.google.com/file/d/0BwGs7_2V6bvEYTBIY3VVV0tNWE0/view?usp=drive_link&resourcekey=0-j-OGtQO8Va-ymqIXXc3vvQ. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources. https://wyocomet.wyo.gov/repositories/2/digital_objects/4471 Accessed November 23, 2024.