The references I used were:
Over The Front Volume 24 No 4, which has 2 useful articles by Alan D. Toelle, "A White-Faced Cow and the Operational History of the Escadrille Americane N.124 to September 1916" and "Lewis Guns in N.124"
Nieuport Flyers of the Lafayette by Jon Guttman
The first has a story about Paul Pavelka's odd camouflage, which is supposed to be a cow hide! It even has his "brand" on the fuselage side. the second article shows the correct Lewis gun used on this aircraft by Pavelka.
Both of these books have artwork by Robert Karr, Bob Pearson and Ronny Bar, which are really helpful when painting this odd looking plane.

