Governor Joseph M Carey – Petitions for Pardon, Holmberg, Charles, https://drive.google.com/file/d/0B_YiJoTQNoYeMnM1aEV5UFN1V3c/view?usp=drive_link&resourcekey=0-rqLN1Cc8L0XHIW4M9CgmiA. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources.

Governor Joseph M Carey – Petitions for Pardon, Holmberg, Charles, https://drive.google.com/file/d/0B_YiJoTQNoYeMnM1aEV5UFN1V3c/view?usp=drive_link&resourcekey=0-rqLN1Cc8L0XHIW4M9CgmiA. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources. https://wyocomet.wyo.gov/repositories/2/digital_objects/4762 Accessed November 14, 2024.