Pennsylvania Railroad Diesel Locomotive Pictorial Volume Ten, page 770+
Pennsylvania Steel Open Hopper Cars, page 27 has a photo of NW2 #9166 (about 3/4 visible)
Wikipedia
PRR 8652 (was PRR 5922, built 11/1945)
PRR 9162 (built 2/1948)
PRR 9163 (built 2/1948)
PRR 9171 (built 10/1948)
PRR 9248 (built 12/1948)
PRR 9249 (built 12/1948)
PRR 8664 (was PRR 9164, built 2/1948)
Conrail 9151 (former PRR 9168, former PRR 8668, built 10/1948)
Great Miami #1 (former PRR 9169, built 10/1948)
An unidentified PRR NW2 behind the other engines
NW2 drawings (includes a very large version)
NW2 drawings (bad quality scan)
NW2 side-profile (both sides) drawings
How Trains Work (With Southern Pacific NW2 #1423)
IHB NW2 #8814
Reading #103 performing switching duty
Reading NW2 pulling a passenger train
Southern Pacific NW2 #1423 cab ride
Southern Pacific NW2 #1423 cab ride
Marion, Ohio Bunge plant (unlabeled engine)
Interior View (warning: very shaky; it will make you seasick!)
Coopersville & Marne (tourist line that owns an NW2)