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Ludmer, Henry (November 1947). "Oil in Germany"(PDF). The Ohio Journal of Science. 47 (6): 259–263. Retrieved 2009-02-11.
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HQ. U.S.S.T.A.F. (5 March 1944). Plan for Completion of Combined Bomber Offensive Copy I [package]. Dwight D. Eisenhower Presidential Library: SMITH, WALTER BEDELL: Collection of World War II Documents, 1941-1945; Box No.: 48: HQ, U.S.S.T.A.F. MOST SECRET … DECLASSIFIED … 4/4/74{{cite book}}: CS1 maint: location (link)
Cover letter: Spaatz, Carl (5 March 1944). SUBJECT: Plan for Completion of Combined Bomber Offensive TO: General Dwight D. Eisenhower, supreme Allied Commander, Headquarters, ETOUSA. Headquarters United States Strategic Air Forces in Europe APO 633: Office of the Commanding General. SECRET … DECLASSIFIED … 4/24/74 …3Incls:{{cite book}}: CS1 maint: location (link)
"Plan": Williamson, Charles C.; Hughes, R. D.; Cabell, C. P.; Nazarro, J. J.; Bender, F. P.; Crigglesworth, W. J. (5 March 1944). "Plan for the Completion of the Combined Bomber Offensive": 5 pages + Appendices A–G & Supplement. the rapid attrition of the German Fighter Force in being [vice production] can best be achieved by attacks on objectives which are so vital to the German War Machine that they must defend them with everything they have, or face the rapid reduction of their military forces to impotence. … the action to be adopted: … b. must favor a Rankin.{{cite journal}}: Cite journal requires |journal= (help)
"Supplement": _____ "Reexamination of Previously Recommended Target Systems": 2 pages + Parts 1–10. [targets] which the C.A.S. and Casablanca directives have specifically mentioned{{cite journal}}: Cite journal requires |journal= (help)
"Part 1": _____ "Prospect for Ending War by Air Attack Against German Morale": 2 pages. Day raids by American heavy bombers against [morale] have little merit as a means of exploiting air supremacy over Germany. Neither fear, war weariness, nor the prospect of impoverishment is likely to be sufficient to enable impotent political and social groups to overthrow the efficient, terroristic Nazi social controls and bring about RANKIN. … The will of the Nazi party to resist Allied military pressure springs from strong, simple urges. It is generally agreed, and is doubtless clear to the party's leading members, that their chances for survival after RANKIN are slight.{{cite journal}}: Cite journal requires |journal= (help)
…
"Part 10": _____ "Target Potentialities of Oil -- March 1944": 7 pages, including Tables 1–4. {{cite journal}}: Cite journal requires |journal= (help)
^Galland, Adolf (1968) [1954]. The First and the Last: The Rise and Fall of the German Fighter Forces, 1938-1945. Ninth Printing - paperbound. New York: Ballantine Books. p. 239.