Governor DeForest Richards - Petition for Pardon Herbert Ambler, https://drive.google.com/file/d/0B_YiJoTQNoYeMWJMTkttSDdWS2s/view?usp=drive_link&resourcekey=0-f5gQCeDQO5VikDywVJAyqA. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources.

Governor DeForest Richards - Petition for Pardon Herbert Ambler, https://drive.google.com/file/d/0B_YiJoTQNoYeMWJMTkttSDdWS2s/view?usp=drive_link&resourcekey=0-f5gQCeDQO5VikDywVJAyqA. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources. https://wyocomet.wyo.gov/repositories/2/digital_objects/694 Accessed February 17, 2025.