I am conducting research into George Marshall's "China Mission," his time as Special Envoy to China, 1945-1947. Using the NARA catalog, I found a number of series, all created by the Office of the Special Envoy. However, there are 10 individual series that were all created by the Office, and none of them have been digitized. I am not going to be able to go to the National Archives at College Park in person to use a research room. Is there any way to find which individual records within the series are relevant enough for me to order them online? Some of the series are quite large, so it's not feasible for me to just order everything and sift through it afterwards. Thank you for the help!