Source for on-line sources - esp. POL/fuel
 

The Fischer-Tropsch Archives website offers a wide range of documents relating to Second World War aviationin the Primary Sources-Government Reports and Presentations pages at:

http://www.fischer-tropsch.org/

While most of these deal with fuel issues -- especially synthetic fuel -- it includes US Naval technical Mission reports (the ones for Japan being largely comprehensive) and wartime intelligence reports on POL subjects.