[ARC5] Manuals of unknown source

[Michael Tauson]

Hi, folks,

Okay, I've got a minor problem.  I've got some electronic documents
and I have no clue where I got them so I can attibute them properly.
These are as follows:

1.) A PDF of a letter from NAS Patuxent River to the Chief of BuAer
regarding the
installation of a Yardley Tuner equipped R-26 and an ART-13
transmitter in a test in a TBM, dated 21 August, 1944.

2.) A set of 4 JPGs regarding the synchronization of radio equipment
with aircraft from The office of the Chief Signal Officer to the
Assistant Chief of Air Staff, dated 14 November, 1942.

3.) A set of 3 JPGs of a list of radios in several types of USAAC
aircraft dated 19
November, 1942.

4.) A set of 4 JPGs of a list of radios in USAAC fighter aircraft in
different theaters
dated 18 November 1942.

5.) A set of 5 GIFs of an undated list of radio equipment in the
different types and models of Naval aircraft.

6.) A set of 2 PDF documents of a book excerpt regarding the radios in
Naval aircraft, published  in 1935.

If anyone has any clues where they came from, I would love to know.

BEst regards,

Michael