Sources:

Appleman, Roy Edgar. East of Chosin: Entrapment and Breakout in Korea, 1950. Texas A & M University Press, 1987. 
Edmonds, Walter D. "The Robenson Mission." They Fought with What They Had: The Story of the Army Air Forces in the Southwest Pacific, 1941-1942. Washington, D.C.: Center for Air Force History, 1992. 371-92. Print.
Gray, John Edward. Called to Honor: Memoirs of a Three-War Veteran. Brent, 2006. 
Mossman, Billy C. Ebb and Flow: November 1950-July 1951. Center of Military History, U.S. Army, 1990. 
Risch, Erna, Chester L. Kieffer, Alvin Stauffer, William F. Ross, and Charles F. Romanus. The Technical Services.. The Quartermaster Corps: Operations in the War against Japan. N.p.: n.p., 1956. 21-25. Print.
Rogers, Bogart. “Help for the Heroes of Bataan.” Cosmopolitan, Nov. 1945, pp. 46–136.
Rogers, Bogart. “Help for the Heroes of Bataan.” Cosmopolitan, Dec. 1945, pp. 70–154. 
“Robenson Interviews.”  Beulah Williams Library Archives manuscript collections.  FF30, Box 72. Northern State University (Aberdeen, S.D.)
“Robenson Mission: Various Photocopied Letters and Articles.” Beulah Williams Library Archives manuscript collections.  FF31, Box 72. Northern State University (Aberdeen, S.D.)
Underbrink, Robert L. Destination Corregidor. United States Naval Institute, 1971. 
Vallowe, Ray C. What History Failed to Record: A Phantom Force - Lost to History. 2015. 
Webb, Robert G. The Pacific Odyssey of Capt. William H. Daly and the 147th Field Artillery Regiment, 1941-1946. South Dakota Historical Society, 1993. 

A very special thank you to Sherry Doney who enthusiastically replied to my message seeking information on Paul.  She is currently among the closest links to Paul as the daughter of his widow.  She generously supplied the portrait, Purple Heart certificate, and photos from Australia.  Information about his adoption also gives some hope of positively identifying his remains in the future.  It was a pleasure to be in touch with her and I think we both found great meaning in connecting the way we did.