Here a screenshot from German version of the online shop Amazon, where you see a preview of the book "Dreamland: The Secret History of Area 51" by Peter W. Merlin.
I have never seen this picture showing Have Blue in a hangar at Skunk Works from this angle before.
Secondary sources at German Amazon.de or at British Amazon.co.uk:
I haven't seen a preview of this book at US Amazon.com, so far.
Book: Dreamland: The Secret History of Area 51 by Peter W. Merlin, page 260
Dear mods, I kept the resolution of this attached picture as small as possible.
Please let me know, if due to forum rules, I should delate this attached picture.