https://openlibrary.org/authors/OL18434A/United_States._Adjutant-General's_Office.
United States. Adjutant-General's Office. | Open Library
Author of Official army register of the volunteer force of the United States army for the years 1861, '62, '63, '64, '65 .., Army battle casualties and...
adjutant general s officeunited statesopenlibrary
https://www.archives.gov/research/guide-fed-records/groups/407.html
Records of the Adjutant General's office, 1917- [AGO]
Records of the Adjutant General
adjutant general s officerecords1917ago