Memorandum # 369, Assignment of Highest National Priority to the SENTINEL Program, 3/29/1968,
"NSAM 369 [Assignment of Highest National Priority to the Sentinel Program]," National Security Action Memorandums, NSF, Box 9,
LBJ Presidential Library,
accessed May 01, 2025,
https://www.discoverlbj.org/item/nsf-nsam369